WO2016076341A1 - 遮熱コーティングを備えた耐熱部材及びその製造方法 - Google Patents
遮熱コーティングを備えた耐熱部材及びその製造方法 Download PDFInfo
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- WO2016076341A1 WO2016076341A1 PCT/JP2015/081677 JP2015081677W WO2016076341A1 WO 2016076341 A1 WO2016076341 A1 WO 2016076341A1 JP 2015081677 W JP2015081677 W JP 2015081677W WO 2016076341 A1 WO2016076341 A1 WO 2016076341A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
- F02F3/12—Pistons having surface coverings on piston heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/008—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of engine cylinder parts or of piston parts other than piston rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/002—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature
- B22F7/004—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of porous nature comprising at least one non-porous part
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/087—Coating with metal alloys or metal elements only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/02—Surface coverings of combustion-gas-swept parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/10—Pistons having surface coverings
- F02F3/12—Pistons having surface coverings on piston heads
- F02F3/14—Pistons having surface coverings on piston heads within combustion chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2301/00—Using particular materials
- F01L2301/02—Using ceramic materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F2200/00—Manufacturing
Definitions
- the present invention relates to a heat-resistant member provided with a thermal barrier coating and a method for producing the same.
- an internal combustion engine such as a reciprocating engine provided in an automobile, a ship, a generator, or the like includes a cylinder block (engine block), a cylinder head, a piston, and the like.
- a piston is incorporated in the cylinder and a cylinder head is attached to the cylinder block.
- the combustion chamber of an internal combustion engine is comprised by the inner wall of the cylinder which a cylinder block has, the piston head which a piston has on the top surface, and a cylinder head.
- Cast iron or the like has been used as a material for the members constituting such a combustion chamber, but lighter aluminum alloys and the like have come to be widely used.
- the internal combustion engine can achieve high output by increasing the displacement and compression ratio.
- the cooling loss increases as the compression ratio increases, the improvement in the thermal efficiency of the internal combustion engine reaches its peak.
- the cooling loss reaches about 30% of the heat energy generated in the internal combustion engine, and reducing the cooling loss is an important issue for realizing higher output of the internal combustion engine and further reducing fuel consumption. It has become.
- a method of forming a ceramic heat shield film by sintering inorganic oxide, inorganic carbide, inorganic nitride or the like on the inner wall of the combustion chamber is known. It has been. Since ceramics such as zirconia have characteristics of high heat resistance and low thermal conductivity, a ceramic thermal barrier film is excellent in heat insulation. However, since ceramics tend to have a relatively high heat capacity (volume specific heat, heat capacity per unit volume), the temperature of the ceramics cannot appropriately follow the fluctuation of the gas temperature in the combustion chamber.
- the inner wall temperature of the combustion chamber that has risen during the combustion stroke of the internal combustion engine becomes difficult to decrease due to the heat flowing into the combustion chamber, and there is concern about a decrease in intake efficiency and the occurrence of abnormal combustion. .
- the thermal barrier film is required to have a low heat capacity.
- the inner wall of the combustion chamber is subject to repeated thermal expansion and contraction during the cycle of the internal combustion engine and a strong combustion pressure due to the fuel gas. Has been. Therefore, as a technique for realizing a thermal barrier film having a low heat capacity and good adhesion, a technique for forming an anodized film on the inner wall of the combustion chamber and a technique for forming a porous sprayed film are used.
- As another method for forming a heat shielding film there has been proposed a technique in which ceramic particles having a hollow structure with a low heat capacity are contained in a metal phase to form a heat shielding film.
- Patent Document 1 provides a heat insulating material in which a hollow particle layer is provided in a state where a large number of hollow particles are densely packed on the surface of a metal base material, and the hollow particle layer is covered with a film.
- the hollow particle layer is formed by brazing a hollow particle molded body in which hollow particles are bonded to each other by pulse electric current sintering or heat-press molding using a binder film (paragraph) 0046, paragraph 0051, etc.) and that the film is made of metal or metal oxide (see paragraphs 0041, 0042, etc.).
- Patent Document 2 discloses a heat shielding film formed on the wall surface of a metal base material, in which a plurality of ceramic hollow particles are bonded to each other by spot joining with a metal phase to form a heat shielding film.
- a thermal barrier film in which ceramic hollow particles and a wall surface forming the thermal barrier film are also bonded to each other by spot bonding with a metal phase.
- the thermal barrier film is formed by mixing a metal particle paste composed of at least metal particles and a solvent and ceramic hollow particles to form a slurry, applying the slurry to the wall surface of the metal base material, and at least at a temperature equal to or higher than the boiling point of the solvent.
- the solvent is volatilized by heating, and further, the metal particles are melted by heating at a temperature equal to or higher than the melting temperature of the metal particles to form a metal phase formed by sintering the molten metal between a plurality of ceramic hollow particles.
- JP 2012-072746 A Japanese Patent No. 5136629
- the use of ceramic hollow particles having a hollow structure contributes to low heat conductivity and thermal responsiveness as well as heat resistance and heat insulation. Therefore, it is possible to form a thermal barrier film having a low heat capacity.
- the hollow particles are covered with a film as described in Patent Document 1 or bonded to a metal phase as described in Patent Document 2, thereby causing distortion due to thermal expansion, thermal contraction, or the like. May also be obtained.
- the anodic oxide film utilized conventionally is formed in the surface of members, such as aluminum and aluminum alloy, in the porous state, it has the characteristics that heat transfer is excellent and heat conductivity and heat capacity are also low.
- it can be formed by energizing the member in an electrolytic solution, and it is not necessary to use other materials in combination.
- the main component of the thermal barrier film is the ceramic hollow particle in realizing a low heat capacity.
- the material cost is increased, and the productivity may be impaired.
- the anodized film is formed as an integral structure continuous from the base material, and in general, it can only be formed with a film thickness of about 500 ⁇ m or less, ensuring sufficient heat insulation by itself. There is a current situation that is difficult to do.
- conventionally used sprayed films have low followability to thermal strain and are highly likely to peel off due to thermal fatigue, and materials that can be used for spraying are those in which the projected particles are sufficiently melted. limited.
- the base material is made of aluminum or the like, it is difficult to obtain sufficient adhesion and the productivity is poor.
- an object of the present invention is to provide a heat-resistant member equipped with a thermal barrier coating that is suitable for stable production and has good heat insulating properties, thermal responsiveness, and distortion followability, and a manufacturing method thereof.
- the heat-resistant member according to the present invention is a heat-resistant member provided with a thermal barrier coating, and the thermal barrier coating includes a metal phase composed of a plurality of metal particles and the metal phase. It has the inorganic compound particle
- the method for producing a heat-resistant member according to the present invention includes a step of arranging a mixed particle of a plurality of metal particles and inorganic compound particles in a film shape on the surface of a base material, the mixed particles arranged in a film shape, Including resistance heating by energization while pressurizing in the film thickness direction, and joining each of the metal particles and the metal phase composed of a plurality of the metal particles and the base material to each other by diffusion bonding. It is characterized by.
- thermo barrier coating that is suitable for stable production and has good heat insulating properties, thermal responsiveness, and distortion followability, and a method for manufacturing the same.
- FIG. 1 It is a schematic diagram which shows an example of the cross-sectional structure of the heat-resistant member which concerns on embodiment of this invention. It is an enlarged view of an example of the section structure of the heat-resistant member concerning the embodiment of the present invention. It is a schematic diagram which shows the other example of the cross-section of the heat-resistant member which concerns on embodiment of this invention. It is sectional drawing which shows schematic structure of the to-be-processed material used for manufacture of the heat-resistant member which concerns on embodiment of this invention, and an electricity joining apparatus. (A) is a schematic sectional drawing of a to-be-processed material, (b) is a schematic sectional drawing of an electric current joining apparatus.
- FIG. 1 It is a schematic diagram which shows the layer structure of the heat-resistant member which concerns on a modification.
- A is a schematic diagram of the heat-resistant member provided with the thermal barrier coating of 2 layer structure
- (b) is a schematic diagram of the heat-resistant member provided with the thermal barrier coating which has a coating layer in the outermost layer. It is a figure illustrated about the thermal responsiveness of a heat-resistant member. It is a figure which shows the measurement result of the temperature fluctuation of a heat-resistant member.
- A) is the perspective view which looked at the piston for internal combustion engines from the lower side
- (b) is the perspective view of a pressurizing member.
- sectional drawing shows the piston for internal combustion engines clamped with the pressurization member.
- FIG. 1 is a schematic diagram showing an example of a cross-sectional structure of a heat-resistant member according to an embodiment of the present invention.
- a heat-resistant member 10 is a heat-resistant member provided with a thermal barrier coating, and a base material 1 composed of an arbitrary metal member and a surface of the base material 1. It is comprised with the formed thermal barrier coating 11.
- a metal member that should have heat insulating properties is applied. More specifically, for example, structural materials, mechanism members, various parts, and the like are included in the application target.
- a member that is required to have thermal responsiveness that can follow its own temperature in accordance with the environmental temperature in addition to the heat insulating property is suitably applied.
- the base material 1 of the heat-resistant member 10 can be made of an appropriate metal or alloy, but is preferably made of steel, aluminum, copper, nickel, titanium, or an alloy containing these as main components. Of these, aluminum or an aluminum alloy is particularly preferable. With such a material, the heat-resistant member 10 is reduced in weight. Moreover, since there exists favorable electroconductivity, it becomes possible to form the uniform thermal barrier coating 11 stably.
- the thermal barrier coating 11 has a metal phase (11) composed of an assembly of a plurality of metal particles 2 and inorganic compound particles (4, 5) dispersed in the metal phase (11). As shown in FIG. 1, the inorganic compound particles (4, 5) are randomly and irregularly dispersed in the film thickness direction and the film surface direction of the thermal barrier coating 11.
- a combination of a hollow inorganic compound particle 4 having a hollow structure and a solid inorganic compound particle 5 having a solid structure is used as the inorganic compound particles (4, 5). .
- the metal particles 2 and each of the metal phase (11) and the base material 1 of the heat-resistant member 10 are joined to each other by diffusion bonding. That is, the metal particles 2 are solid-phase bonded in a state where deformation is suppressed to a low level without melting and forming a liquid phase. Further, in the vicinity of the boundary surface between the thermal barrier coating 11 and the base material 1, the metal particles 2 and the base material 1 are solid-phase bonded without melting and forming a liquid phase. As described above, the metal particles 2 and the metal particles and the base material 1 are joined by diffusion bonding, so that the followability to strain is improved, and even if thermal stress or external force is applied, the crack progresses or peels off. Therefore, the thermal barrier coating 11 having excellent durability is formed.
- FIG. 2 is an enlarged view of an example of a cross-sectional structure of the heat-resistant member according to the embodiment of the present invention.
- FIG. 2 shows an enlarged view of the vicinity of the hollow inorganic compound particles 4 dispersed in the metal phase (11) of the thermal barrier coating 11.
- the metal phase (11) as shown in FIG. 2, an aggregate 3 composed of metal particles 2 aggregated by diffusion bonding is formed. Unlike the metal structure formed by re-solidification of the liquid phase metal once melted, the aggregate 3 substantially holds the particle shape of each metal particle 2. Further, some of the metal particles 2 independently maintain the particle shape without forming the aggregate 3. Therefore, fine voids 6 are left around the metal particles 2 and the aggregates 3 over the entire area of the metal phase (11).
- the inorganic compound particles (4, 5) have an average particle size larger than the average particle size of the metal particles 2, and the inorganic compound particles (4, 5) and the metal particles 2 are not diffusion bonded. Therefore, relatively large holes 6 are formed around the inorganic compound particles (4, 5). In addition, around the inorganic compound particles (4, 5), a large number of metal particles 2 that maintain the particle shape are distributed independently of the aggregate 3, and fine pores 6 are left in a high distribution. Yes. These holes 6 are messy and irregularly present in the film thickness direction and the film surface direction of the thermal barrier coating 11, and contribute to improvement of heat insulation and realization of a low heat capacity. Moreover, there exists an effect
- particles made of an appropriate metal or alloy can be used according to the required performance of the heat-resistant member 10.
- Preferable materials are steel, aluminum, copper, nickel, titanium, or an alloy containing these as a main component.
- good electrical conductivity is ensured in the pressurization energization process at the time of forming the thermal barrier coating 11, so that a plurality of metal particles 2 can be uniformly diffused and joined. And by performing the diffusion bonding well, the holes 6 having a high volume fraction are surely formed.
- the average particle diameter of the metal particles 2 is preferably 1/3 or less, more preferably 1/10 or less, of the average particle diameter of the inorganic compound particles (4, 5). As described above, when the average particle size of the metal particles 2 is smaller than the average particle size of the inorganic compound particles (4, 5), the contact property of the metal particles 2 is enhanced in the pressure energization process when the thermal barrier coating 11 is formed. Therefore, the metal particles 2 or the metal particles 2 and the base material are easily diffused and joined uniformly.
- the material of the metal particles 2 may be the same as or different from the material of the base material 1.
- the metal particles 2 are made of the same material as the base material 1, deformation due to the difference in coefficient of thermal expansion is suppressed, so that peeling of the thermal barrier coating 11 can be reduced.
- the intermediate layer 7 made of an intermetallic compound by making the metal particles 2 different from the base material 1 and selecting an appropriate combination of materials.
- FIG. 3 is a schematic diagram showing another example of the cross-sectional structure of the heat-resistant member according to the embodiment of the present invention.
- the thermal barrier coating 11 is an intermediate layer made of an intermetallic compound between the metal phase (11) and the base material 1. 7 may be taken. In such a form, the metal phase (11) and the base material 1 are diffusion bonded with the intermediate layer 7 interposed therebetween.
- the intermediate layer 7 is made of an intermetallic compound of atoms derived from the metal particles 2 and different kinds of atoms derived from the base material 1.
- the intermetallic compound is formed by diffusion and bonding of atoms derived from the metal particles 2 and different atoms derived from the base material 1 in the process of diffusion bonding in the formation of the thermal barrier coating 11.
- Specific examples of the intermetallic compound include FeAl, Fe 3 Al, NiAl, Ni 3 Al, and the like.
- Such an intermediate layer 7 can be formed according to an appropriate combination of materials, a heating temperature, or the like. By forming the intermediate layer 7, the heat resistance of the heat-resistant member 10 can be improved. .
- the inorganic compound particles (4, 5) particles of an appropriate material can be used.
- Preferred particles are silica, silica balloon, alumina, alumina bubble, zirconia, glass, foamed glass, shirasu earth, fly ash balloon and the like.
- the inorganic compound particles (4, 5) may be any of a crystalline compound and an amorphous compound, and may be particles having an appropriate shape such as a spherical shape, a plate shape, a rectangular parallelepiped shape, or a fibrous shape. is there.
- the hollow inorganic compound particles 4 are prepared by, for example, a method of mixing resin particles and inorganic compound powder, coating the resin particles with the inorganic compound powder, and then thermally decomposing and removing the resin particles by firing. Can do.
- the average particle diameter of the inorganic compound particles (4, 5) is preferably in the range of about 30 ⁇ m to 80 ⁇ m.
- the inorganic compound particles (4, 5) in FIG. 1 a combination of the hollow inorganic compound particles 4 and the solid inorganic compound particles 5 is shown. Instead, only the hollow inorganic compound particles 4 are used. It may be used, or only solid inorganic compound particles 5 may be used. However, from the viewpoint of reducing the heat capacity of the heat-resistant member 10, the hollow inorganic compound particles 4 are preferably used. On the other hand, since the solid inorganic compound particles 5 are excellent in mechanical strength and durability as compared with the hollow inorganic compound particles 4, the solid inorganic compound particles 5 are used alone or in combination. 10 strength and durability can be improved.
- the volume fraction of the inorganic compound particles (4, 5) in the metal phase (11) is preferably 10% or more and 65% or less, and more preferably 10% or more and 50% or less.
- the volume fraction of the inorganic compound particles (4, 5) is 10% or more, the porosity can be secured satisfactorily, so that the heat capacity of the thermal barrier coating 11 can be sufficiently lowered.
- the metal particles 2 can be used with a sufficient volume fraction. Therefore, in the pressurization energization process at the time of forming the thermal barrier coating 11, good energization is ensured, and diffusion bonding can be performed reliably.
- FIG. 4 is a cross-sectional view showing a schematic configuration of a material to be processed and an electric current joining device used for manufacturing a heat-resistant member according to an embodiment of the present invention.
- A is a schematic sectional drawing of a to-be-processed material
- (b) is a schematic sectional drawing of an electric current joining apparatus.
- the method for manufacturing a heat-resistant member according to the present embodiment includes a step of arranging a mixed particle of a plurality of metal particles and inorganic compound particles in a film shape on the surface of a base material, and the mixed particles arranged in a film shape as a film
- the method includes a step of resistance heating by energization while pressing in the thickness direction, and joining the metal particles to each other, and each of the metal phase composed of a plurality of the metal particles and the base material by diffusion bonding. .
- the base material 1 on which the mixed particles 12 composed of the metal particles 2 and the inorganic compound particles (4, 5) are arranged on the surface is used as the material to be treated W (see FIG. 4A).
- the mixed particles 12 composed of the metal particles 2 and the inorganic compound particles (4, 5) are arranged in a film shape on the surface of the base material 1 on which the thermal barrier coating 11 is formed.
- the mixed particles 12 may be obtained by either dry mixing or wet mixing.
- an appropriate device such as a V-type mixer, a W-type mixer, a vibration-type mixer, or a drum-type mixer may be used. Can be used.
- the volume ratio of each of the metal particles 2, the hollow inorganic compound particles 4 and the solid inorganic compound particles 5, the particle size distribution, and the like can be appropriately adjusted and used.
- the thermal barrier coating 11 is formed by pressurizing the mixed particles 12 arranged in a film shape. Therefore, by filling the concave portion 1a with the mixed particles 12, the mixed particles 12 are prevented from being excluded from the surface of the base material 1 during pressurization, and the distribution of the inorganic compound particles (4, 5) and the pores 6 is prevented. Can be formed and the thermal barrier coating 11 with high film thickness accuracy can be formed.
- the recessed part 1a can be made into an appropriate shape according to the shape of the base material 1, the shape of the thermal barrier coating 11 to be formed, or the like. What is necessary is just to design the depth of the recessed part 1a according to the film thickness of the thermal-insulation coating 11 formed, the bulk density of the mixed particle 12, the load at the time of pressurization, etc.
- the mixed particles 12 disposed on the surface of the base material 1 are resistance-heated by energization while being pressurized in the film thickness direction.
- the metal particles 2 and each of the metal phase 11 composed of the aggregate of the metal particles 2 and the base material 1 are joined to each other by diffusion bonding, and the thermal barrier coating 11 is formed on the base material 1. Is done.
- the pressurization energization process can be performed by the energization joining apparatus 100 (see FIG. 4B).
- the energization joining apparatus 100 includes a power supply unit 20, a chamber 21, a pair of electrode units 22 and 22, and a drive mechanism (not shown).
- Each of the pair of electrode portions 22 and 22 is connected to the power source portion 20 via a conducting wire, and is configured to be energized between the electrode portions 22. Further, the pair of electrode portions 22 and 22 can be moved relative to each other by a driving mechanism (not shown).
- pressurizing members 23 and 24 are detachably attached to the electrode portions 22 and 22, and the workpiece W sandwiched between the pressurizing members 23 and 24 is provided between the electrodes. It is supposed to be fixed to. Therefore, when the electrode unit 22 is driven by a drive mechanism (not shown), a load is applied to the workpiece W, and the mixed particles 12 are mechanically pressurized.
- the pressing members 23 and 24 are made of a material having mechanical strength and conductivity suitable for pressing. For example, a carbon material. Therefore, in a state where the material W to be processed is disposed between the pressure members 23 and 24 and the mixed particles 12 are mechanically pressurized, the metal particles 2 and the base material 1 and the metal particles 2 are electrically connected.
- the pressurization energization process can be performed by energization from the power supply unit 20. When energization is performed, Joule heat is generated in the base material 1 and the metal particles 2, and the metal particles and each of the metal phase and the base material are joined to each other by diffusion bonding under pressure heating. Become.
- the bonding proceeds mainly around the interface between the base material 1 and the metal particles 2 due to the interface resistance, so that the thermal deformation of the base material 1 and the metal particles 2 can be suppressed to a low level.
- the current to be energized in the pressure energization process is preferably a pulse current.
- a pulse current that intermittently energizes a high current is used, the metal particles 2 and between the metal phase (11) and the base material 1 can be heated more uniformly. Can be further reduced. Since the metal particles 2 and between the base material 1 and the metal particles 2 can be joined by point joining, it is possible to ensure the porosity and form the thermal barrier coating 11 with a more uniform mechanical strength distribution. Can be suitably performed.
- the material W to be processed is accommodated in the airtight chamber 21 and subjected to the process.
- the interior of the chamber 21 is preferably an inert gas atmosphere such as argon gas or a vacuum atmosphere.
- an inert gas atmosphere is advantageous in securing the porosity because the internal pressure of the holes 6 is maintained as compared to a vacuum atmosphere.
- the thermal barrier coating 11 can be formed by diffusion bonding using resistance heating using the metal particles 2, it is necessary to heat a wide region of the base material 1. There is no.
- the heat-resistant member can be manufactured only by the process centering on the pressurization energization process, so that the lead time can be shortened. Therefore, the thermal stress generated by heating hardly remains in the base material 1 and defects in the cooling process are reduced, so that a heat-resistant member having a reduced thermal history can be stably produced.
- the pressurizing members 23 and 24 and the conditions of the pressurization energization process are appropriately designed, it becomes possible to produce a heat-resistant member with high production only by the process centering on the pressurization energization process.
- the production method can reduce the burden on the environment.
- the heat-resistant member 10 manufactured by such a manufacturing method has good heat resistance because the thermal barrier coating 11 is composed of the metal particles 2 and the inorganic compound particles (4, 5).
- the formed thermal barrier coating 11 has a metal phase (11) composed of the metal particles 2, and the metal particles 2 and the base material 1 and the metal particles 2 are diffusion-bonded, resulting in thermal stress and external force.
- the hollow inorganic compound particles 4 having excellent followability to strain, excellent heat insulation, and low heat capacity are also stably held in the metal phase (11). And since the porosity is high and the distribution of the holes 6 is uniform, a low heat capacity and followability to strain are provided.
- limiting with respect to the film thickness of the thermal barrier coating 11 formed decreases.
- the thermal barrier coating 11 is formed by arranging the mixed particles 12 of the metal particles 2 and the inorganic compound particles (4, 5) in the form of a film, and applying the pressure-current energizing treatment at a time to perform diffusion bonding.
- the mixed particles 12 of the metal particles 2 and the inorganic compound particles (4, 5) arranged on the surface can be formed by multilayering by sequentially applying a pressure current and performing diffusion bonding.
- the thermal insulation can be further improved by increasing the thickness of the coating 11.
- a preferable thickness of the thermal barrier coating 11 provided in the heat-resistant member 10 is 0.1 mm or more and 5 mm or less.
- the heat-resistant member 10 provided with the thermal barrier coating 11 can be applied to a structural material, a mechanism member, various parts and the like that should have heat insulation properties.
- Specific examples of applicable objects include, for example, pistons for internal combustion engines, cylinder heads, cylinder liners, valve seats provided for intake valves and exhaust valves, liners for intake ports and exhaust ports, super-absorber turbines, turbine engines, and generators.
- the turbine blade etc. with which etc. are provided.
- pistons for internal combustion engines are particularly preferable among them, and providing a heat-resistant piston for internal combustion engines by forming a thermal barrier coating 11 on the piston head of the piston that is the base material 1. it can.
- an aluminum or aluminum alloy piston is preferably used, and as the metal particles 2, any of aluminum, aluminum alloy, nickel and nickel alloy is preferably used.
- the piston for the internal combustion engine is suitable for installation and energization in the energization joining apparatus 100 (see FIG. 4B), and the thermal barrier coating 11 can be formed in accordance with various valve recesses by the design of the pressurizing member. It is preferable in that the workability is not hindered.
- FIG. 5 is a schematic diagram showing a layer structure of a heat-resistant member according to a modification.
- A is a schematic diagram of the heat-resistant member provided with the thermal barrier coating of 2 layer structure
- (b) is a schematic diagram of the heat-resistant member provided with the thermal barrier coating which has a coating layer in the outermost layer.
- the thermal barrier coating 11 is replaced with the inorganic compound particles (4, 4) instead of the layer structure having the inorganic compound particles (4, 5) uniformly dispersed in the metal phase (11).
- a layer configuration having a gradient distribution in the film thickness direction with respect to the volume fraction of 5) can also be adopted.
- the thermal barrier coating 11A includes an inner layer 13 in which the volume fraction of the inorganic compound particles (4, 5) is relatively low, and inorganic compound particles ( 4 and 5) and the outer layer 14 having a relatively high volume fraction.
- the volume fraction of the inorganic compound particles (4, 5) has a gradient distribution in the film thickness direction.
- the layer structure of the thermal barrier coating 11A is a two-layer structure of the inner layer 13 and the outer layer 14 in FIG. 5A, but the volume fraction of the inorganic compound particles (4, 5) is in the film thickness direction. It is also possible to have a layer configuration of three or more layers having a gradient distribution. Further, the volume fraction of the inorganic compound particles (4, 5) is not limited to a configuration that changes stepwise with a step in the thickness direction, and may be a configuration that changes continuously in the thickness direction. In the thermal barrier coating having such a layer structure, the mixed particles 12 as materials are arranged in advance on the surface of the base material 1 so that the volume fraction of the inorganic compound particles (4, 5) changes stepwise or continuously.
- the heat-resistant member 10 may have a layer structure in which the thermal barrier coating 11 has a coating layer on the surface opposite to the base material 1 of the metal phase (11).
- the thermal barrier coating 11B has a relatively high porosity because the volume fraction of the inorganic compound particles (4, 5) is high.
- a covering layer 15 is provided on the outer layer 14.
- the coating layer 15 is composed of a plurality of metal particles 2 and has a lower porosity than the metal phase (11) immediately below (the metal phase of the outer layer 14 in FIG. 5B).
- the metal particles 2 forming the coating layer 15 may be the same material as or different from the metal phase (11) on the base material 1 side.
- the thermal barrier coating 11B has a configuration in which a coating layer 15 is provided on two layers of an inner layer 13 and an outer layer 14, but the coating layer 15 and the base material 1
- the layer configuration between them may be a single layer or a multi-layer configuration of three or more layers.
- Such a coating layer 15 is formed by laminating metal particles 2 for forming the coating layer 15 on the outermost layer side of the mixed particles 12 disposed on the surface of the base material 1, and performing diffusion bonding by applying pressure and current treatment at a time.
- a method of laminating the metal particles 2 forming the coating layer 15 on the metal phase (11) that has already been bonded to the base material 1 side by diffusion bonding, and performing diffusion bonding by sequentially applying pressure and current. can be formed.
- Production Examples 1-1 to 1-7 of heat-resistant members provided with a thermal barrier coating having a single layer structure, and production of heat-resistant members provided with a thermal barrier coating having a multilayer structure Examples 2-1 to 2-3 were produced.
- the heat-resistant member according to Production Example 1-1 uses pure nickel particles having an average particle diameter of 3 ⁇ m as metal particles so that the volume fraction becomes 82% by volume, and the hollow inorganic compound particles have an average particle diameter.
- a disk-shaped aluminum alloy mold casting “AC8A-T6” JIS H 5202 having a diameter of 50 mm ⁇ thickness of 10 mm is formed, and a recess having a diameter of 30 mm ⁇ depth of 5 mm is formed on one side.
- AC8A-T6 JIS H 5202
- a recess having a diameter of 30 mm ⁇ depth of 5 mm is formed on one side.
- Shirasu soil Shirasu balloon “MSB-301” composed of 75% by volume of SiO 2 , 22% by volume of Al 2 O 3 and the balance composed of Fe oxide, Mg oxide or Ti oxide was used. .
- the mixed particles composed of metal particles and inorganic compound particles are arranged in a film shape in the concave portion of the base material, and the base material is sandwiched between a pair of pressure members, and the energization joining apparatus in the form shown in FIG. Installed.
- the pressurizing member is composed of a columnar carbon material having a diameter of 60 mm on the bottom side of the base material, and a top side of the base material is composed of a columnar carbon material having a diameter of 30 mm. It was made to fit in the concave part of the material with a slight gap.
- the drive of the electrode part of the current bonding apparatus was configured such that the top side of the base material was stationary and the bottom side of the base material was moved.
- the energization in the pressurization energization process is performed by a pulse current, and the chamber is depressurized with an initial load of 1.5 kN applied to the material to be processed by the pressurizing member, so that the internal pressure in the chamber is in a range of 3 Pa to 4 Pa. When it reached, the power supply was started.
- the energization conditions are set so that the temperature rise rate of the surface temperature of the formed metal phase is 150 ° C./min, and energization stops when the surface temperature of the metal phase reaches the range of 450 ° C. to 460 ° C. did.
- the heat-resistant member diffusion-bonded by the pressure energization treatment was recovered by cooling the formed thermal barrier coating to a range of 100 ° C. or lower and then opening the chamber. As a result of confirming the metal structure of the obtained heat-resistant member according to Production Example 1-1, formation of an intermediate layer made of the intermetallic compound Ni 3 Al was observed.
- the heat-resistant member according to Production Example 1-2 uses pure nickel particles having an average particle diameter of 3 ⁇ m as metal particles so that the volume fraction becomes 54% by volume, and the hollow inorganic compound particles have an average particle diameter.
- formation of an intermediate layer composed of the intermetallic compound Ni 3 Al was observed.
- the heat-resistant member according to Production Example 1-3 uses pure aluminum particles having an average particle diameter of 25 ⁇ m as metal particles so that the volume fraction is 40% by volume, and the hollow inorganic compound particles have an average particle diameter.
- the electrical conductivity was lost due to the high volume fraction of the insulating hollow inorganic compound particles, and a thermal barrier coating could not be formed in the pressure energization process. .
- the heat-resistant member according to Production Example 1-4 uses, as metal particles, particles made of pure aluminum having an average particle size of 25 ⁇ m so that the volume fraction is 50% by volume.
- an intermediate layer made of an intermetallic compound was not formed.
- the thermal barrier coating had a slightly brittle structure due to the relatively high volume fraction of the hollow inorganic compound particles.
- the heat-resistant member according to Production Example 1-5 uses pure aluminum particles having an average particle diameter of 25 ⁇ m as metal particles so that the volume fraction becomes 60% by volume, and the hollow inorganic compound particles have an average particle diameter.
- the intermediate layer made of the intermetallic compound was not formed because the metal particles and the base material were made of the same kind of metal.
- the heat-resistant member according to Production Example 1-6 uses pure aluminum particles having an average particle diameter of 25 ⁇ m as metal particles so that the volume fraction becomes 70% by volume, and the hollow inorganic compound particles have an average particle diameter.
- an intermediate layer made of an intermetallic compound was not formed.
- the heat-resistant member according to Production Example 1-7 uses pure nickel particles having an average particle diameter of 3 ⁇ m as metal particles so that the volume fraction becomes 82% by volume, and the hollow inorganic compound particles have an average particle diameter.
- a hollow glass having a volume of 24 ⁇ m was used so that the volume fraction was 18% by volume.
- glass bubbles “S60HS” composed of 80% by volume of SiO 2 , 13% by volume of B 2 O 3 and the balance of NaO and Al 2 O 3 was used.
- the obtained heat-resistant member according to Production Example 1-7 had a good thermal conductivity and an appropriate thermal barrier coating was formed due to the small particle size of the metal particles.
- the heat-resistant member according to Production Example 2-1 has a two-layer structure including an inner layer and an outer layer.
- the inner layer pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 82% by volume, and shirasu earth having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. It used so that a fraction might be 18 volume%.
- As for the outer layer pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 54% by volume, and shirasu soil having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. Was used such that the volume fraction was 46% by volume.
- a thermal barrier coating was formed by applying a pressure current at a time in the same manner as in Production Example 1-1, except that the concave portions of the base material were filled with the mixed particles stacked.
- formation of an intermediate layer made of the intermetallic compound Ni 3 Al was observed between the base material and the inner layer.
- the heat-resistant member according to Production Example 2-2 has a two-layer structure including an inner layer and an outer layer.
- the inner layer pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 82% by volume, and shirasu earth having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. It used so that a fraction might be 18 volume%.
- As for the outer layer pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 54% by volume, and shirasu soil having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. Was used such that the volume fraction was 46% by volume.
- the mixed particles are filled in the recesses of the base material, and the inner layer is formed by applying pressure and current in the same manner as in Production Example 1-1. Subsequently, the mixed particles forming the outer layer are stacked on the upper part of the inner layer. Then, in the same manner as in Production Example 1-1, a heat-shielding coating was formed by forming an outer layer by applying a pressure current. As a result of confirming the metal structure of the obtained heat-resistant member according to Production Example 2-2, formation of an intermediate layer made of the intermetallic compound Ni 3 Al was observed between the base material and the inner layer.
- the heat-resistant member according to Production Example 2-3 has a configuration in which a coating layer is provided on the outer side of the inner layer and the outer layer.
- a coating layer is provided on the outer side of the inner layer and the outer layer.
- pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 82% by volume
- shirasu earth having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. It used so that a fraction might be 18 volume%.
- pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 54% by volume
- shirasu soil having an average particle diameter of 50 ⁇ m is used as hollow inorganic compound particles. Was used such that the volume fraction was 46% by volume.
- the coating layer only pure nickel particles having an average particle diameter of 3 ⁇ m were used as metal particles. Then, with the exception that the particles formed in the inner layer, the outer layer, and the coating layer are stacked, the concave portions of the base material are filled, and in the same manner as in Production Example 1-1, a pressure energization treatment is performed at a time for shielding. A thermal coating was formed. By the addition of the coating layer, the thermal conductivity coating having the coating layer was appropriately formed although the electrical conductivity was different from those of other production examples.
- FIG. 6 is a diagram illustrating the thermal responsiveness of the heat-resistant member.
- the heat-resistant member applied as a member constituting the combustion chamber of the internal combustion engine has a surface temperature that becomes the temperature of the combustion gas when the combustion gas is heated in the combustion stroke of the cycle of the internal combustion engine.
- a temperature rise occurs from the reference temperature (T 0 ) at the beginning of the cycle to the ultimate temperature (T 1 ).
- T 1 the temperature of the combustion gas
- T 0 the temperature difference corresponding to the heat capacity with respect to the reference temperature (T 0) results in (.DELTA.t1).
- the combustion chamber in the combustion stroke or the like the combustion chamber is increased temperature, attained temperature (ultimate temperature T 1, T 2, T 3 ⁇ T n
- T 1, T 2, T 3 ⁇ T n Attained temperature
- the heat exchange response to the cooling medium of the internal combustion engine is also required.
- the heat-resistant member has good thermal responsiveness to the temperature of the combustion chamber, the cooling medium, and the like.
- the heat responsiveness of the heat-resistant member according to Production Example 1-1 and the heat-resistant member according to Production Example 1-2 produced as an example is compared with the conventional heat-resistant member (comparison with the temperature change accompanying the heating / cooling cycle).
- the heat responsiveness of the heat-resistant member according to the example was compared and evaluated.
- a heat-resistant member according to a comparative example a base material (comparative example 1) of an aluminum alloy mold casting “AC8A-T6” (JIS H 5202) without a thermal barrier coating, and an anodized film are used.
- the base material (Comparative Example 2) of the formed aluminum alloy mold casting “AC8A-T6” (JIS H 5202) was used as a heat-resistant member according to a comparative example.
- the thickness of the thermal barrier coating in Production Example 1-1 and Production Example 1-2 is about 850 ⁇ m
- the thickness of the anodized film in Comparative Example 2 is 20 ⁇ m on average.
- the thermal responsiveness was measured by repeating the heat treatment by laser irradiation and the cooling treatment on the surface of the heat-resistant member, and measuring the fluctuation of the surface temperature.
- the laser was set to a constant output for all treatments, and in the cooling treatment, the heat treatment and cooling treatment cycles were repeated three times in total as a treatment for lowering the surface temperature to 100 ° C. after the heat treatment.
- the heat-resistant black coating material was apply
- Temperature difference ( ⁇ t1, ⁇ t2) from the initial temperature (reference temperature (T 0 )) before the start of the cycle, the reached temperatures (T 1 , T 2 , T 3 ) during the heat treatment, and the reference temperature (T 0 ) during the cooling treatment , ⁇ t3) are shown in Table 1 and FIG.
- FIG. 7 is a diagram showing a measurement result of temperature variation of the heat-resistant member.
- FIG. 7 shows a graph of measurement results of temperature fluctuations of Production Example 1-1 produced as an example and Comparative Examples 1 and 2.
- the example has a higher reached temperature than Comparative Example 1 and Comparative Example 2, and it can be confirmed that the temperature drop during cooling is close to the initial temperature.
- the Example shows a tendency that the temperature rise start time, the cooling start time, and the cooling rate are faster than those of Comparative Example 1 and Comparative Example 2, and it is recognized that the thermal response is good. Therefore, in the Example of this invention, it turns out that the fall of a heat capacity is implement
- Production Examples 3-1 to 3-3 in which a heat-resistant member provided with a thermal barrier coating was applied to a piston for an internal combustion engine were produced.
- a simulated piston that simulates a piston product for an internal combustion engine was produced.
- FIG. 8 is a perspective view of a piston for an internal combustion engine and a pressurizing member.
- A is the perspective view which looked at the piston for internal combustion engines from the lower side
- (b) is the perspective view of a pressurizing member.
- FIG. 9 is a perspective view showing a piston for an internal combustion engine sandwiched between pressurizing members.
- FIG. 10 is a cross-sectional view showing a piston for an internal combustion engine sandwiched between pressurizing members.
- the internal combustion engine piston (simulated piston) 30 of the manufacturing example is assumed to be formed with a heat-resistant coating on the piston head 31, and is simplified for easy application of pressure energization processing.
- the structure was Specifically, the inside of the skirt portion 32 is configured with a flat curved surface and a thermal barrier coating is formed so that the pressing member 40 (see FIG. 8B) can be easily fitted.
- the piston head 31 is configured by a horizontal plane.
- the recessed part 31a (refer FIG. 9) filled with the mixed particle of a metal particle and an inorganic compound particle was formed on this horizontal surface.
- the material of the simulated piston 30 was a chemical component composition corresponding to a die casting “AC8A” (JIS H5202) made of aluminum alloy.
- the top surface of the pressurizing member 40 is constituted by a horizontal surface so as to be in close contact with the ceiling surface inside the skirt portion 32 of the simulated piston 30, and the bottom surface of the pressurizing member 40. Was also horizontal.
- a part of the top surface side of the pressure member 40 is cut away so as to correspond to the boss portion 33 of the simulated piston 30.
- Both the pressure member 40 and the pressure members 41 and 43 (see FIGS. 9 and 10) to be paired are made of a carbon material.
- the heat-resistant members according to Production Example 3-1 to Production Example 3-3 change the shape of the pressure members 41 and 43 arranged on the cylinder head 31 side and the material of the metal particles as follows. Produced by treatment.
- One pressurizing member 41 has a lower end surface 41a that pressurizes the mixed particles 12 as a horizontal plane (see FIG. 10A), and the other pressurizing member 43 has a lower end surface 43a that pressurizes the mixed particles 12 in a conical shape. It shape
- the pressure energization treatment is performed by mounting the simulated piston 30 in which the mixed particles 12 of the metal particles and the inorganic compound particles as the material are filled in the recess 31a, and the carbon sheet 50 on the top surface. It performed using the to-be-processed material Wa and Wb pinched
- the carbon sheet 50 is used for enlarging the contact area between the simulated piston 30 and the pressurizing member 40 to ensure electrical conductivity.
- the simulated piston according to Production Example 3-1 was manufactured using the pressurizing member 41 shown in FIG. 10A and the thermal barrier coating having the same configuration as in Production Example 1-2. That is, pure nickel particles having an average particle diameter of 3 ⁇ m are used as metal particles so that the volume fraction is 54% by volume, and shirasu earth having an average particle diameter of 50 ⁇ m is used as the hollow inorganic compound particles. Was made to be 46% by volume. It was confirmed that the simulated piston according to Production Example 3-1 was pressurized and energized with good energization, and a thermal barrier coating having an intermediate layer could be formed by diffusion bonding.
- Production Example 3-2 The simulated piston according to Production Example 3-2 was manufactured using the pressurizing member 41 shown in FIG. 10A and the thermal barrier coating having the same configuration as in Production Example 1-5. That is, pure aluminum particles having an average particle size of 25 ⁇ m are used as metal particles so that the volume fraction is 60% by volume, and shirasu soil having an average particle size of 50 ⁇ m is used as the hollow inorganic compound particles. Was made to be 40% by volume. It was confirmed that the simulated piston according to Production Example 3-2 was pressurized and energized by good energization, and a thermal barrier coating could be formed by diffusion bonding.
- Production Example 3-3 The simulated piston according to Production Example 3-3 was produced in the same manner as Production Example 3-1, except that the pressurizing member 43 shown in FIG. 10B was used.
- the simulated piston according to Production Example 3-3 was pressurized and energized by good energization, and it was confirmed that a thermal barrier coating having an intermediate layer could be formed with a near net depending on the shape of an appropriate pressure member.
- Production Example 3-4 The simulated piston according to Production Example 3-4 was produced in the same manner as Production Example 3-2 except that the pressurizing member 43 shown in FIG. 10B was used. The simulated piston according to Production Example 3-4 was subjected to pressurization and energization treatment with good energization, and it was confirmed that the thermal barrier coating could be formed with a near net by an appropriate shape of the pressurization member.
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Abstract
Description
製造例1-1に係る耐熱部材は、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が82体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が18体積%となるように使用して製造した。
製造例1-2に係る耐熱部材は、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が54体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が46体積%となるように使用した点を除いて、製造例1-1と同様にして製造した。得られた製造例1-2に係る耐熱部材の金属組織を確認した結果、金属間化合物Ni3Alからなる中間層の形成が認められた。
製造例1-3に係る耐熱部材は、金属粒子として、平均粒径が25μmの純アルミニウム製の粒子を体積分率が40体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が60体積%となるように使用した点を除いて、製造例1-1と同様にして製造した。製造例1-3に係る耐熱部材は、絶縁性の中空無機化合物粒子の体積分率が高いために通電性が失われており、加圧通電処理において遮熱コーティングを形成することができなかった。
製造例1-4に係る耐熱部材は、金属粒子として、平均粒径が25μmの純アルミニウム製の粒子を体積分率が50体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が50体積%となるように使用した点を除いて、製造例1-1と同様にして製造した。得られた製造例1-4に係る耐熱部材の金属組織を確認した結果、金属粒子と母材とが同種の金属からなるため、金属間化合物からなる中間層は形成されていなかった。遮熱コーティングは、中空無機化合物粒子の体積分率が比較的高いためにやや脆い構造となった。
製造例1-5に係る耐熱部材は、金属粒子として、平均粒径が25μmの純アルミニウム製の粒子を体積分率が60体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が40体積%となるように使用した点を除いて、製造例1-1と同様にして製造した。得られた製造例1-5に係る耐熱部材の金属組織を確認した結果、金属粒子と母材とが同種の金属からなるため、金属間化合物からなる中間層は形成されていなかった。
製造例1-6に係る耐熱部材は、金属粒子として、平均粒径が25μmの純アルミニウム製の粒子を体積分率が70体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が30体積%となるように使用した点を除いて、製造例1-6と同様にして製造した。得られた製造例1-6に係る耐熱部材の金属組織を確認した結果、金属粒子と母材とが同種の金属からなるため、金属間化合物からなる中間層は形成されていなかった。
製造例1-7に係る耐熱部材は、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が82体積%となるように使用し、中空無機化合物粒子として、平均粒径が24μmの中空ガラスを体積分率が18体積%となるように使用した点を除いて、実施例1と同様にして製造した。なお、中空ガラスとしては、SiO2が80体積%、B2O3が13体積%、残部がNaOとAl2O3とで組成されるグラスバブルズ「S60HS」を使用した。得られた製造例1-7に係る耐熱部材は、金属粒子の粒径が小さいこともあって、通電性が良く適切に遮熱コーティングが形成されていた。
製造例2-1に係る耐熱部材は、内層と外層との2層構成とした。内層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が82体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が18体積%となるように使用した。また、外層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が54体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が46体積%となるように使用した。そして、混合粒子を積層した状態で母材の凹部に充填した点を除いて、製造例1-1と同様にして一時に加圧通電処理することによって遮熱コーティングを形成した。得られた製造例2-1に係る耐熱部材の金属組織を確認した結果、母材と内層との間に、金属間化合物Ni3Alからなる中間層の形成が認められた。
製造例2-2に係る耐熱部材は、内層と外層との2層構成とした。内層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が82体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が18体積%となるように使用した。また、外層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が54体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が46体積%となるように使用した。そして、混合粒子を母材の凹部に充填して、製造例1-1と同様にして加圧通電処理して内層を形成し、続いて、外層を形成する混合粒子を内層の上部に積層して、製造例1-1と同様にして加圧通電処理して外層を形成して遮熱コーティングを形成した。得られた製造例2-2に係る耐熱部材の金属組織を確認した結果、母材と内層との間に、金属間化合物Ni3Alからなる中間層の形成が認められた。
製造例2-3に係る耐熱部材は、内層と外層との2層の外側に被覆層が設けられた構成とした。内層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が82体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が18体積%となるように使用した。また、外層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が54体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が46体積%となるように使用した。また、被覆層については、金属粒子として、平均粒径が3μmの純ニッケル製の粒子のみを使用した。そして、内層、外層及び被覆層のそれぞれ形成する粒子を積層させた状態で母材の凹部に充填した点を除いて、製造例1-1と同様にして一時に加圧通電処理することによって遮熱コーティングを形成した。被覆層が付加されることで、通電性が他の製造例と異なっていたものの、被覆層を有する遮熱コーティングが適切に形成された。
製造例3-1に係る模擬ピストンは、図10(a)に示す加圧部材41を使用し、遮熱コーティングを製造例1-2と同様の構成として製造した。すなわち、金属粒子として、平均粒径が3μmの純ニッケル製の粒子を体積分率が54体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が46体積%となるように使用して製造した。製造例3-1に係る模擬ピストンは、良好な通電によって加圧通電処理されており、拡散接合によって中間層を有する遮熱コーティングを形成できることが確認された。
製造例3-2に係る模擬ピストンは、図10(a)に示す加圧部材41を使用し、遮熱コーティングを製造例1-5と同様の構成として製造した。すなわち、金属粒子として、平均粒径が25μmの純アルミニウム製の粒子を体積分率が60体積%となるように使用し、中空無機化合物粒子として、平均粒径が50μmのシラス土を体積分率が40体積%となるように使用して製造した。製造例3-2に係る模擬ピストンは、良好な通電によって加圧通電処理されており、拡散接合によって遮熱コーティングを形成できることが確認された。
製造例3-3に係る模擬ピストンは、図10(b)に示す加圧部材43を使用した点を除いて、製造例3-1と同様にして製造した。製造例3-3に係る模擬ピストンは、良好な通電によって加圧通電処理されており、適切な加圧部材の形状によって、中間層を有する遮熱コーティングをニアネットで形成できることが確認された。
製造例3-4に係る模擬ピストンは、図10(b)に示す加圧部材43を使用した点を除いて、製造例3-2と同様にして製造した。製造例3-4に係る模擬ピストンは、良好な通電によって加圧通電処理されており、適切な加圧部材の形状によって、遮熱コーティングをニアネットで形成できることが確認された。
2 金属粒子
4 中空無機化合物粒子
5 中実無機化合物粒子
6 空孔
10 耐熱部材
11 遮熱コーティング
Claims (13)
- 遮熱コーティングを備えた耐熱部材であって、
前記遮熱コーティングは、
複数の金属粒子の集合からなる金属相と、
前記金属相中に分散した無機化合物粒子とを有し、
前記金属粒子同士、及び、前記金属相と前記耐熱部材の母材とのそれぞれが、拡散接合によって互いに接合されている
ことを特徴とする耐熱部材。 - 複数の前記金属粒子が、金属相中に空孔を残しつつ互いに接合されている
ことを特徴とする請求項1に記載の耐熱部材。 - 前記無機化合物粒子が、中空構造を有する中空無機化合物粒子、又は、中空無機化合物粒子と中実構造を有する中実無機化合物粒子との組み合わせからなる
ことを特徴とする請求項1に記載の耐熱部材。 - 前記遮熱コーティングが、
前記金属相と前記母材との間に金属間化合物からなる中間層をさらに有し、
前記金属相と前記母材とが、前記中間層を挟んで接合されている
ことを特徴とする請求項1に記載の耐熱部材。 - 前記金属粒子の平均粒子径が、前記無機化合物粒子の平均粒子径の1/3以下である
ことを特徴とする請求項1に記載の耐熱部材。 - 前記金属粒子の平均粒子径が、前記無機化合物粒子の平均粒子径の1/10以下であることを特徴とする請求項1に記載の耐熱部材。
- 前記無機化合物粒子の前記金属相中における体積分率が、10%以上65%以下であることを特徴とする請求項1に記載の耐熱部材。
- 前記遮熱コーティングが、前記無機化合物粒子の体積分率について膜厚方向の勾配分布を有する
ことを特徴とする請求項1に記載の耐熱部材。 - 前記遮熱コーティングが、前記金属相の前記母材とは反対側の表面上に、複数の金属粒子の集合からなり前記金属相よりも空孔率が低い被覆層をさらに有する
ことを特徴とする請求項1に記載の耐熱部材。 - 前記遮熱コーティングの厚さが、0.1mm以上5mm以下である
ことを特徴とする請求項1に記載の耐熱部材。 - 請求項1から請求項10のいずれか一項に記載の耐熱部材において、
前記母材が、ピストンであり、
前記遮熱コーティングが、ピストンヘッド上に形成されている
ことを特徴とする内燃機関用ピストン。 - 前記母材が、アルミニウム製又はアルミニウム合金製のピストンであり、
前記遮熱コーティングが有する複数の前記金属粒子が、アルミニウム、アルミニウム合金、ニッケル及びニッケル合金のいずれかよりなる
ことを特徴とする請求項11に記載の内燃機関用ピストン。 - 母材の表面上に複数の金属粒子と無機化合物粒子との混合粒子を膜状に配する工程、
膜状に配された前記混合粒子を、膜厚方向に加圧しつつ通電によって抵抗加熱し、前記金属粒子同士、及び、複数の前記金属粒子の集合からなる金属相と前記母材とのそれぞれを、拡散接合によって互いに接合する工程
を含むことを特徴とする耐熱部材の製造方法。
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JP2018053879A (ja) * | 2016-09-30 | 2018-04-05 | 日立オートモティブシステムズ株式会社 | 内燃機関用ピストンおよび内燃機関用ピストンの製造方法 |
JP2018127972A (ja) * | 2017-02-09 | 2018-08-16 | 日立オートモティブシステムズ株式会社 | 内燃機関用ピストン及びその製造方法 |
WO2018198898A1 (ja) * | 2017-04-25 | 2018-11-01 | 日立オートモティブシステムズ株式会社 | ピストン |
WO2019049738A1 (ja) * | 2017-09-06 | 2019-03-14 | 日立オートモティブシステムズ株式会社 | 内燃機関のピストン、内燃機関のピストンの膜厚測定方法、及び内燃機関のピストンの製造方法 |
WO2019187273A1 (ja) * | 2018-03-26 | 2019-10-03 | 日立オートモティブシステムズ株式会社 | 内燃機関用ピストンおよび内燃機関用ピストンの製造方法 |
US10578049B2 (en) | 2017-04-28 | 2020-03-03 | Mahle International Gmbh | Thermal barrier coating for engine combustion component |
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JP6859942B2 (ja) * | 2017-12-19 | 2021-04-14 | トヨタ自動車株式会社 | 内燃機関 |
JP2021173214A (ja) * | 2020-04-24 | 2021-11-01 | マツダ株式会社 | エンジンの燃焼室構造 |
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JP2018053879A (ja) * | 2016-09-30 | 2018-04-05 | 日立オートモティブシステムズ株式会社 | 内燃機関用ピストンおよび内燃機関用ピストンの製造方法 |
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US10578049B2 (en) | 2017-04-28 | 2020-03-03 | Mahle International Gmbh | Thermal barrier coating for engine combustion component |
WO2019049738A1 (ja) * | 2017-09-06 | 2019-03-14 | 日立オートモティブシステムズ株式会社 | 内燃機関のピストン、内燃機関のピストンの膜厚測定方法、及び内燃機関のピストンの製造方法 |
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JP2019167928A (ja) * | 2018-03-26 | 2019-10-03 | 日立オートモティブシステムズ株式会社 | 内燃機関用ピストンおよび内燃機関用ピストンの製造方法 |
JP7021991B2 (ja) | 2018-03-26 | 2022-02-17 | 日立Astemo株式会社 | 内燃機関用ピストンおよび内燃機関用ピストンの製造方法 |
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US10267260B2 (en) | 2019-04-23 |
JPWO2016076341A1 (ja) | 2017-08-31 |
EP3219827A1 (en) | 2017-09-20 |
US20170284333A1 (en) | 2017-10-05 |
JP6356823B2 (ja) | 2018-07-11 |
EP3219827A4 (en) | 2018-04-11 |
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