WO2019188480A1 - 多孔質チタン系焼結体、その製造方法及び電極 - Google Patents
多孔質チタン系焼結体、その製造方法及び電極 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/06—Metallic powder characterised by the shape of the particles
- B22F1/065—Spherical particles
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- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/11—Making porous workpieces or articles
- B22F3/1103—Making porous workpieces or articles with particular physical characteristics
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- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/134—Electrodes based on metals, Si or alloys
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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
- B22F2301/00—Metallic composition of the powder or its coating
- B22F2301/20—Refractory metals
- B22F2301/205—Titanium, zirconium or hafnium
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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
- B22F2304/00—Physical aspects of the powder
- B22F2304/10—Micron size particles, i.e. above 1 micrometer up to 500 micrometer
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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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a porous titanium-based sintered body, and more particularly to a porous titanium-based sintered body suitably used as an electrode for a filter, a fuel cell or a large-sized storage battery.
- Porous titanium-based sintered bodies obtained by sintering titanium-based powders have long been used as filters for high-temperature melts, etc.
- it has been attracting attention in applications such as nickel metal hydride battery and lithium battery electrode plate base materials, biomaterials, catalyst base materials, fuel cell members, and the like, and is being developed.
- Patent Document 1 discloses a method for producing a porous titanium sintered body having a high porosity by sintering titanium fibers. Yes.
- Patent Document 2 discloses a method of producing a sintered body having a porosity of 35 to 55% by sintering spherical powder particles of titanium or a titanium alloy by a gas atomization method.
- Patent Document 1 a porous titanium sintered body obtained by sintering titanium fibers has a high porosity, but the pore diameter and strength have not been studied.
- Porous titanium sintered body obtained by sintering spherical titanium powder by gas atomization method as in Patent Document 2 has a low porosity, but since the degree of circularity is large, there are few contact points between the powders and the strength is low, so the strength is improved. There was a request.
- an object of the present invention is to provide a high-strength porous titanium-based sintered body that has good pore diameters and void ratios in parallel.
- the present inventors have conducted intensive studies and have obtained the following knowledge.
- the present inventors have decided to employ a relatively light titanium-based powder as the metal material among the metals.
- the present inventors have assumed that a titanium-based powder that is a crushed product is effective rather than a titanium-based powder having a high degree of circularity manufactured by a gas atomization method.
- the crushed product has a non-uniform shape compared to the gas atomized product, and has many corners. Therefore, there were many contact points between powders, and since the powders formed bridges, it was considered that a high porosity could be secured.
- the porous titanium-based sintered body when used as a gas generating electrode, the gas generated in the electrode can be well removed from the electrode. Therefore, not only is it excellent in strength, but also damage caused by gas generation can be suppressed.
- the present invention has been completed based on the above findings.
- the present invention (1) provides a porous titanium-based sintered body having a porosity of 45 to 65%, an average pore diameter of 5 to 15 ⁇ m, and a bending strength of 100 MPa or more.
- the present invention (2) provides an electrode comprising the porous titanium-based sintered body of (1).
- an average circularity is 0.93 or less
- a D90: 25 ⁇ m or less titanium-based powder obtained by particle size distribution measurement is dry and substantially no pressure applied in a mold.
- the present invention provides a method for producing a porous titanium sintered body including a step of placing and then sintering at 850 ° C. or more and less than 950 ° C.
- a high-strength porous titanium-based sintered body that has good pore diameter and porosity.
- the porous titanium-based sintered body of the present invention has a porosity of 45 to 65%, an average pore diameter of 5 to 15 ⁇ m, and a bending strength of 100 MPa or more.
- the porous titanium-based sintered body is a sintered body of granular titanium-based powder, and has a large number of pores inside.
- the titanium-based powder according to the present invention is titanium powder, hydrogenated titanium powder, titanium powder coated with titanium nitride or titanium silicide, titanium alloy powder, or a composite material combining these.
- the titanium-based powder in the present invention include titanium powder composed of metal titanium and inevitable impurities, titanium alloy powder composed of metal titanium, alloy metal and inevitable impurities, and the like.
- the titanium-based powder according to the present invention may be a crushed powder such as HDH powder (hydrodehydrogenated powder).
- a titanium alloy is an alloy of titanium and a metal (alloy metal) such as Fe, Sn, Cr, Al, V, Mn, Zr, and Mo.
- Ti-6-4 Ti-6Al -4V
- Ti-5Al-2.5Sn Ti-8-1-1 (Ti-8Al-1Mo-1V)
- Ti-6-2-4-2 Ti-6Al-2Sn-4Zr-2Mo-0) .1Si
- Ti-6-6-2 Ti-6Al-6V-2Sn-0.7Fe-0.7Cu
- Ti-6-2-4-6 Ti-6Al-2Sn-4Zr-6Mo
- SP700 Ti-4.5Al-3V-2Fe-2Mo
- Ti-17 Ti-5Al-2Sn-2Zr-4Mo-4Cr
- ⁇ -CEZ Ti-5Al-2Sn-4Zr-4Mo-2Cr-1Fe
- TIMETAL 555 Ti-5553 (T -5Al-5Mo-5V-3Cr-0.5Fe)
- TIMETAL21S Ti-15Mo-2.7Nb-3Al-0.2Si
- TIMETAL LCB Ti-4.5Fe-6.8Mo
- the porous titanium-based sintered body of the present invention by setting the porosity to 45 to 65%, air permeability and liquid permeability are improved, and high strength is also achieved. If the porosity is less than 45%, good air permeability and liquid permeability may not be ensured. On the other hand, if the porosity exceeds 65%, it means that the porous titanium-based sintered body is too coarse, and there is a concern that a desired strength cannot be ensured.
- the lower limit side of the porosity of the porous titanium-based sintered body of the present invention is preferably 48% or more, more preferably 50% or more.
- the upper limit side of the porosity of the porous titanium-based sintered body of the present invention may be 63% or less, or 60% or less.
- the upper limit side of the porosity of the porous titanium-based sintered body may be 55% or less, or 53% or less.
- the porosity is a percentage of the porosity per unit volume of the porous titanium-based sintered body.
- the volume V indicates the apparent volume of the porous titanium-based sintered body.
- Porosity (%) 100 ⁇ (((M / V) / D) ⁇ 100)
- the porous titanium-based sintered body of the present invention by setting the average pore diameter to 5 to 15 ⁇ m, air permeability and liquid permeability are improved, and high strength is also achieved. If the average pore diameter is less than 5 ⁇ m, the bonding between the fine particles may be too advanced, and the desired porosity and high strength may not be juxtaposed. On the other hand, when the average pore diameter exceeds 15 ⁇ m, the strength tends to be insufficient.
- the lower limit side of the average pore diameter of the porous titanium-based sintered body of the present invention is preferably 7 ⁇ m or more, and more preferably 8 ⁇ m or more.
- the lower limit side of the average pore diameter of the porous titanium-based sintered body is more preferably 10 ⁇ m or more, and further preferably 11 ⁇ m or more.
- the upper limit side of the average pore diameter of the porous titanium-based sintered body of the present invention is preferably 14 ⁇ m or less.
- the upper limit side of the average pore diameter of the porous titanium-based sintered body is more preferably 12 ⁇ m or less.
- V p pore volume (cc / g)
- Sp pore specific surface area (m 2 / g).
- the porous titanium-based sintered body of the present invention can achieve a bending strength of 100 MPa or more. In the present invention, it is considered that this high strength is achieved because a large number of appropriate sintering of fine particles can be obtained simultaneously.
- the bending strength of the porous titanium-based sintered body of the present invention is preferably 110 MPa or more, more preferably 120 MPa or more, and further preferably 130 MPa or more.
- the upper limit of the bending strength of the porous titanium-based sintered body of the present invention is not particularly provided. However, for example, it may be 170 MPa or less and 160 MPa or less.
- the bending strength is a mechanical characteristic that reduces the influence of the thickness and length of the test piece.
- the bending strength is determined according to JIS Z2248 (2006) “Metal material bending test method”. The conditions adopted in the examples described later are as follows. Test piece size: 15 mm ⁇ 50 mm ⁇ 0.5 mm Test temperature: 23 ° C Indentation speed: 2.0 mm / min, Distance between fulcrums: 40mm, Bending radius (indenter / lower fulcrum tip): R5mm, Test piece setting direction: The surface having a rough surface is the indenter side, and the maximum load (N) is obtained. Furthermore, it converts into bending strength by the following formula.
- the method for producing a porous titanium-based sintered body of the present invention is a dry and substantially no pressure application of a titanium-based powder having an average circularity of 0.93 or less and D90: 25 ⁇ m or less obtained by particle size distribution measurement.
- it is a method for producing a porous titanium sintered body including a step of placing in a mold and then sintering at 850 ° C. or more and less than 950 ° C.
- the average circularity of the titanium-based powder used in the production method of the present invention is 0.93 or less. By setting the average circularity to 0.93 or less, good pore diameter and porosity are arranged side by side. An average circularity exceeding 0.93 means that the titanium-based powder is too close to a sphere. That is, the porosity of the porous titanium-based sintered body becomes insufficient, and there is a concern that a desired strength cannot be achieved because a contact point between powders cannot be secured.
- the average circularity of the titanium-based powder used in the production method of the present invention is preferably 0.91 or less, more preferably 0.89 or less.
- the average circularity of the titanium-based powder is determined by the following method.
- the perimeter (A) of the projected area of the particle is measured using an electron microscope, and B / A when the perimeter of a circle having the same area as the projected area is (B) is defined as the circularity.
- the average circularity is determined by flowing particles with a carrier liquid into the cell, capturing a large number of particle images with a CCD camera, and calculating the perimeter (A) of the projected area of each particle from 1000 to 1500 individual particle images.
- the circumference (B) of a circle having the same area as the projected area is measured to calculate the circularity, and the average value of the circularity of each particle is obtained.
- the numerical value of the circularity increases as the particle shape approaches a true sphere, and the circularity of a particle having a complete true sphere shape becomes 1. Conversely, the numerical value of circularity decreases as the particle shape moves away from the true sphere.
- the titanium powder used in the production method of the present invention has a D90 obtained by particle size distribution measurement of 25 ⁇ m or less. A desired strength is achieved by using fine particles intensively. When the D90 of the titanium powder exceeds 25 ⁇ m, it means that the particles are too large. That is, the pore diameter and porosity desired in the present invention cannot be obtained.
- the D90 of the titanium-based powder used in the production method of the present invention is preferably 23 ⁇ m or less.
- the lower limit side of D90 of the titanium-based powder may be 18 ⁇ m or more, or 20 ⁇ m or more.
- the titanium-based powder used in the production method of the present invention is preferably specified also from the viewpoint of D50 obtained by particle size distribution measurement.
- the titanium powder preferably has a D50 of 9 ⁇ m or more and 15 ⁇ m or less.
- the lower limit side of D50 of the titanium-based powder used in the production method of the present invention is preferably 11 ⁇ m or more.
- the upper limit side of D50 of the titanium-based powder may be 14 ⁇ m or less, and may be 13 ⁇ m or less.
- D50 and D90 indicate particle sizes at which the volume-based cumulative distribution is 50% and 90%, respectively, in the particle size distribution measurement obtained by the laser diffraction / scattering method. Specifically, titanium powder particle size distribution is measured by the following method, and D50 and D90 are measured. That is, it measures based on JIS Z8825: 2013.
- the average circularity of the titanium-based powder used in the production method of the present invention can be adjusted as appropriate.
- the average circularity can be adjusted by mixing titanium-based powders having different average circularity.
- D50 and D90 of the titanium powder for example, D50 and D90 can be adjusted by mixing titanium powders having different values.
- the porous titanium-type sintered compact manufactured with the manufacturing method of this invention can adjust a porosity and an average pore diameter by adjusting the average circularity and particle size distribution of the titanium-type powder which is a raw material. For example, if a large amount of powder is present on the fine particle side in the particle size distribution, the porosity and the average pore diameter can be reduced.
- the porosity and the average pore diameter can be increased.
- the porosity and the average pore diameter of the porous titanium-based sintered body can be adjusted based on the adjustment of the average circularity and particle size distribution of the titanium-based powder.
- the titanium-based powder is placed in the mold in a dry and substantially no pressure.
- the bulk density density at the time of filling
- the titanium-based powder is placed on the mold in a wet process
- the titanium-based powder is deposited with anisotropy due to the resistance of the fluid, so that the porosity does not increase to a desired value.
- the titanium-based powder may be densely filled up to the tap density. Further, when the titanium-based powder is placed on the mold, the porosity does not increase if the pressure applied to the upper surface of the titanium-based powder in the mold is too high.
- substantially no pressure refers to the force applied to the titanium-based powder by the weight of the titanium-based powder when the titanium-based powder is filled in the mold, or the molding after filling the mold with the titanium-based powder.
- a force that is intentionally applied to the upper surface of the titanium powder in the mold, excluding the force applied to the upper surface of the titanium powder in the mold when scraping off the titanium powder that overflows above the upper end of the mold. Is a pressure of 1 ⁇ 10 ⁇ 2 MPa / mm 2 or less.
- the pressure applied to the upper surface of the titanium-based powder in the mold is a value obtained by dividing the force applied to the entire upper surface of the filled portion of the titanium-based powder in the mold by the area of the upper surface of the filled portion.
- dry means that water or an organic solvent is not intentionally used.
- the material of the mold used in the present invention can be appropriately selected as long as it does not react with titanium powder, can withstand high temperatures, and can suppress thermal expansion.
- quartz, alumina, graphite, carbon, cogent, indium oxide, calcia, silica, magnesia, zirconia, spinel, silicon carbide, aluminum nitride, boron nitride, mullite, and the like are suitable as the mold material. More preferable mold materials are quartz, alumina, carbon, calcia, magnesia, zirconia, boron nitride and the like because they have good workability.
- the titanium-based powder is sintered at 850 ° C. or more and less than 950 ° C.
- the sintering temperature is the highest temperature reached during sintering. By sintering in this temperature range, good pore diameter and porosity of the manufactured porous titanium-based sintered body are aligned, and high strength of the porous titanium-based sintered body is achieved. If the sintering temperature is less than 850 ° C., there is a concern that appropriate sintering of the fine particles desired in the present invention cannot be obtained. On the other hand, if the sintering temperature is 950 ° C.
- the sintering of the fine particles proceeds too much, and the porosity and strength desired in the present invention may not be aligned.
- the lower limit side of the sintering temperature is preferably 870 ° C. or higher, and more preferably 890 ° C. or higher.
- the upper limit of the sintering temperature is preferably 930 ° C. or less, and more preferably 920 ° C. or less.
- the sintering time when the titanium-based powder is sintered is appropriately selected depending on the size of the sintering furnace, the size of the porous titanium-based sintered body to be produced, and the like.
- the titanium-based powder is usually sintered under reduced pressure.
- a method of sintering the titanium-based powder for example, (1) After placing the titanium-based powder on the mold, the mold is attached with a pressure reduction means and sealed, and after the pressure inside the mold is reduced by the pressure reduction means, the pressure reduction means is removed while maintaining the reduced pressure state. A method in which a mold is placed in a sintering furnace and the titanium powder is heated and sintered. (2) After placing the titanium-based powder on the mold, a pressure reducing means is attached to the mold and sealed, the mold is placed in a sintering furnace, and the pressure inside the mold is reduced by the pressure reducing means in the furnace.
- the method of heating and sintering the titanium powder while stopping the pressure reduction or continuing the pressure reduction (3) After placing the titanium-based powder on the mold, the mold is placed in a sintering furnace, and the inside of the furnace is depressurized together with the mold, and then the decompression is stopped or further reduced And a method of heating and sintering titanium-based powder.
- the atmosphere when the titanium-based powder is sintered is preferably 5.0 ⁇ 10 ⁇ 3 Pa or less. If the pressure in the atmosphere is excessively high, the titanium-based powder is oxidized by excess oxygen present in the atmosphere, and sintering is difficult to occur.
- the average circularity is 0.93 or less, and a D90: 25 ⁇ m or less titanium-based powder obtained by particle size distribution measurement is dry and substantially no pressure applied.
- examples thereof include those placed in a mold and then sintered at 850 ° C. or more and less than 950 ° C. (hereinafter also referred to as a porous titanium-based sintered body of the first aspect of the present invention).
- the titanium-based powder according to the first embodiment of the porous titanium-based sintered body is the same as the titanium-based powder according to the porous titanium-based sintered body of the present invention. That is, the average circularity of the titanium-based powder according to the porous titanium-based sintered body of the first aspect of the present invention is 0.93 or less.
- the average circularity of the titanium-based powder is preferably 0.91 or less, and more preferably 0.89 or less.
- the average circularity exceeds 0.93 it means that the titanium-based powder is too close to a sphere, so that the porosity of the porous titanium-based sintered body becomes insufficient, and a contact point between the powders cannot be secured. Therefore, there is a concern that the desired strength cannot be achieved.
- D90 obtained by particle size distribution measurement is 25 ⁇ m or less, preferably 23 ⁇ m or less.
- a desired strength is achieved by using fine particles intensively.
- the D90 of the titanium-based powder exceeds 25 ⁇ m, it means that the particles are too large, and thus the pore diameter and porosity desired in the present invention cannot be obtained.
- the lower limit side of D90 of the titanium-based powder may be 18 ⁇ m or more, or 20 ⁇ m or more.
- the D50 of the titanium-based powder according to the porous titanium-based sintered body of the first aspect of the present invention is preferably 9 ⁇ m or more and 15 ⁇ m or less.
- the lower limit side of D50 of the titanium-based powder according to the porous titanium-based sintered body of the first aspect of the present invention is preferably 11 ⁇ m or more.
- the upper limit side of D50 of the titanium-based powder may be 14 ⁇ m or less, or 13 ⁇ m or less.
- the titanium-based powder is placed on the mold in a dry and substantially no pressure, and is preferably under reduced pressure, preferably 5.0 ⁇ 10 ⁇ . It is sintered by being heated at 3 Pa or less.
- the sintering temperature of the titanium-based powder is 850 ° C. or higher and lower than 950 ° C. By sintering in this temperature range, good pore diameter and porosity of the manufactured porous titanium-based sintered body are aligned, and high strength of the porous titanium-based sintered body is achieved.
- the sintering temperature is the highest temperature reached during sintering. When the sintering temperature is 850 ° C., there is a concern that proper sintering of the fine particles desired in the present invention cannot be obtained. On the other hand, if the sintering temperature is 950 ° C. or higher, the sintering of the fine particles proceeds too much, and the porosity and high strength desired in the present invention may not be obtained.
- the lower limit side of the sintering temperature of the titanium-based powder is preferably 870 ° C. or higher, and the upper limit side of the sintering temperature is preferably 920 ° C. or lower.
- the porosity of the porous titanium-based sintered body according to the first embodiment of the present invention is 45 to 65%.
- air permeability and liquid permeability are improved, and high strength is achieved. If the porosity is less than 45%, good air permeability and liquid permeability may not be ensured.
- the porosity exceeds 65% it means that the porous titanium-based sintered body is too coarse, and there is a concern that a desired strength cannot be ensured.
- the lower limit of the porosity of the porous titanium-based sintered body according to the first aspect of the present invention is preferably 48% or more, and more preferably 50% or more.
- the upper limit side of the porosity of the porous titanium-based sintered body according to the first aspect of the present invention may be 63% or less, or 60% or less.
- the upper limit side of the porosity of the porous titanium-based sintered body according to the first embodiment of the present invention may be 55% or less, or 53% or less.
- the average pore diameter of the porous titanium-based sintered body according to the first embodiment of the present invention is 5 to 15 ⁇ m.
- the average pore diameter of the porous titanium-based sintered body according to the first embodiment of the present invention within the above range, air permeability and liquid permeability are improved, and high strength is achieved. If the average pore diameter is less than 5 ⁇ m, the bonding between the fine particles may be too advanced, and the desired porosity and high strength may not be juxtaposed. On the other hand, if the average pore diameter exceeds 15 ⁇ m, the strength becomes insufficient.
- the lower limit side of the average pore diameter of the porous titanium-based sintered body according to the first aspect of the present invention is preferably 7 ⁇ m or more, and more preferably 8 ⁇ m or more.
- the lower limit side of the average pore diameter of the porous titanium-based sintered body of the first aspect of the present invention is more preferably 10 ⁇ m or more, and even more preferably 11 ⁇ m or more.
- the upper limit side of the average pore diameter of the porous titanium-based sintered body according to the first aspect of the present invention is preferably 14 ⁇ m or less.
- the upper limit side of the average pore diameter of the porous titanium-based sintered body according to the first aspect of the present invention is more preferably 12 ⁇ m or less.
- the bending strength of the porous titanium-based sintered body according to the first embodiment of the present invention is 100 MPa or more. In the present invention, it is considered that this high strength is achieved because a large number of appropriate sintering of fine particles can be obtained simultaneously.
- the bending strength of the porous titanium-based sintered body according to the first aspect of the present invention is preferably 110 MPa or more, more preferably 120 MPa or more, and further preferably 130 MPa or more.
- the upper limit of the bending strength of the porous titanium-based sintered body according to the first aspect of the present invention is not particularly provided, but for example, it may be 170 MPa or less and 160 MPa or less.
- the porous titanium-based sintered body according to the first aspect of the present invention has an average circularity of 0.93 or less, and is obtained by dry-type and substantially free of D90: 25 ⁇ m or less titanium-based powder obtained by particle size distribution measurement. Since it was placed in a mold under pressure and then sintered at 850 ° C. or more and less than 950 ° C., the porosity is high, the average pore diameter is small, and the strength is high.
- titanium powder having a crushed product shape manufactured by hydrodehydrogenation was used as titanium-based powder.
- Table 1 shows the average circularity, D50, and D90 of the titanium-based powder used. In the measurement, the average circularity was determined using PITA-3 (manufactured by Seishin Enterprise). D50 and D90 were determined according to JIS: Z8825: 2013 using a measuring device: LMS-350 (manufactured by Seishin Enterprise).
- Examples and Comparative Examples Each titanium-based powder was filled in a quartz mold under dry and non-pressurized conditions, and the titanium-based powder overflowing above the upper end of the mold was scraped off. That is, the excessive force other than the scraping operation is not applied to the titanium-based powder.
- a mold filled with titanium-based powder was placed in an environment where the degree of vacuum was at least 3.0 ⁇ 10 ⁇ 3 Pa, and sintered to the sintering temperature shown in Table 1 at a heating rate of 15 ° C./min. Sintered for 1 hour. After sintering, it was cooled to room temperature by furnace cooling to obtain a porous sintered body of titanium-based powder.
- the obtained porous titanium-based sintered body was subjected to analysis, and the porosity, average pore diameter, and bending strength were determined.
- the results are shown in Table 1.
- the average pore diameter was measured by a strain gauge type pressure measurement method using a mercury intrusion measurement apparatus manufactured by Micromeritics.
- Inventive example No. 1, no. 6 and no. No. 7 has good fine particle shape, particle size distribution, and sintering temperature. Therefore, the produced porous titanium-based sintered body is a high-strength porous titanium-based sintered body having preferable values for porosity and average pore diameter. If the strength is increased by a conventional method without controlling the powder physical properties of the titanium-based powder, it is presumed that the porosity is remarkably reduced although the strength is increased. On the other hand, No. of invention example. 1, no. 6 and no. In No. 7, since the powder physical properties of the titanium-based powder in the present invention are controlled, the strength is high while the porosity is kept high. In particular, among the inventive examples, No.
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Abstract
Description
しかし、一般に多孔体の強度を上げると空隙率が低下してしまう。その内容は多孔体の原料となる粉体等が密になるほど焼結体の強度が高くなるというものである。
ここで、フィルター等圧損が発生する用途では、強度が高いことで通気性や通液性を改善しうる。しかし、適切な気孔を確保し、かつ空隙率が高くなければ圧力をかけても多孔体の通気性や通液性が向上しにくい。よって、金属質多孔体において良好な気孔径と空隙率を並立しつつ、高強度化したいという要望があった。
本発明者らは金属の中では比較的軽量のチタン系粉を金属材料として採用することとした。さらに、ガスアトマイズ法にて製造した円形度の高いチタン系粉ではなく、破砕品であるチタン系粉が有効であると本発明者らは想定した。破砕品はガスアトマイズ品と比較して形状が不均一であり、角部も多く存在する。よって、粉末同士の接触点が多く、粉末同士はブリッジを形成するため高い空隙率を確保できると考えた。さらに、接触点が多い状態で適切に焼結面積を確保すれば、良好な気孔径と空隙率を実現しつつ、高強度化が達成できると考えた。
一方、ガスアトマイズ品等円形度の高い粉末を使用すると、一定空間に充填される粒子量が多くなるため空隙率が低くなる。さらに円形の粉末同士は接触点が少ないため良好な焼結点を確保しにくく、所望の強度が得られないおそれがある。
以上の知見に基づき原料となるチタン系粉の粒子径とその焼結温度について種々検討を重ねた結果、粒度分布測定でD90が特定の値以下となる微粉を集中して利用し、かつ特定の温度域で焼結することが有効であるとの知見を本発明者らは得た。さらに検討を重ね、本発明者らは45%以上の空隙率と5~15μmの平均気孔径を実現しつつ100MPa以上の高強度を達成した。
このような多孔質チタン系焼結体は高強度であるため耐圧性に優れ、かつ良好な気孔径と空隙率を有するため通気性や通液性に優れるものである。また、多孔質チタン系焼結体がガス発生電極として使用される場合、電極内で発生するガスを良好に電極外に除ける。よって、強度として優れるだけでなく、ガス発生に起因する破損をも抑制できる。
以上の知見に基づき本発明は完成された。
空隙率は多孔質チタン系焼結体の単位体積あたりの空隙の割合を百分率で示したものである。本発明では、多孔質チタン系焼結体の体積V(cm3)と、多孔質チタン系焼結体の質量M(g)と、焼結体を構成する金属部の真密度D(g/cm3)(例えば、純チタンの場合は真密度4.51g/cm3)から以下の式で空隙率を算出する。なお、上記体積Vは、多孔質チタン系焼結体の見かけ体積を指す。
空隙率(%)=100-(((M/V)/D)×100)
本発明では、水銀圧入法(Washburnモデル)により平均気孔径を求める。
平均気孔径(μm)=2×Vp/Sp
ここで、Vp:細孔容積(cc/g)、Sp:細孔比表面積(m2/g)である。
-測定条件:JIS R 1655(2003)-
圧力計測法:ストレンゲージ法
温度:室温
前処理:室温で6Pa程度まで減圧後、水銀圧入開始
試験片サイズ:15mm×50mm×0.5mm、
試験温度:23℃、
押込み速度:2.0mm/min、
支点間距離:40mm、
曲げ半径(圧子/下部支点先端):R5mm、
試験片セット方向:表面粗さが粗い面を圧子側とし、最大荷重(N)を求める。さらに、下記式で曲げ強度に変換する。
※1:断面係数Z=wt2/6(断面の形状のみで決定する値)
※2:曲げモーメントM=Fmax×L/4(試料の中心に圧力がかかるため)
本発明の多孔質チタン系焼結体の製造方法は、平均円形度が0.93以下であり、粒度分布測定により得られるD90:25μm以下のチタン系粉を、乾式且つ実質的に無加圧で、成形型中に載置させ、次いで、850℃以上950℃未満で焼結させる工程を含む、多孔質チタン焼結体の製造方法である。
上記円形度の数値は粒子の形状が真球に近くなるほど大きくなり、完全な真球の形状を有する粒子の円形度は1となる。逆に、粒子の形状が真球から離れるにつれて円形度の数値は小さくなる。
本発明においてD50及びD90は、レーザー回折・散乱法により求められる粒度分布測定において、体積基準の累積分布が、それぞれ、50%、90%となる粒径を指す。詳細には、以下の方法によりチタン系粉粒度分布を測定し、D50およびD90を測定する。すなわち、JIS Z8825:2013に基づき測定する。
なお、本発明の製造方法で製造される多孔質チタン系焼結体は、原料であるチタン系粉の平均円形度と粒度分布を調整することで空隙率や平均気孔径を調整しうる。例えば、粒度分布において細粒側に多くの粉が存在するようにすれば空隙率および平均気孔径を小さくすることができる。また、粒度分布において粗粒側において多くの粉が存在するようにすれば空隙率および平均気孔径を大きくすることができる。空隙率と平均気孔径の変化には必ずしも相関関係はないが、チタン系粉の平均円形度と粒度分布の調整に基づき多孔質チタン系焼結体の空隙率と平均気孔径を調整しうる。
(1)チタン系粉を成形型に載置した後、成形型に減圧手段を付設して密閉し、減圧手段で成形型内を減圧した後、減圧状態を保ったまま、減圧手段を外し、焼結用の炉内に成形型を設置し、チタン系粉を加熱して焼結させる方法、
(2)チタン系粉を成形型に載置した後、成形型に減圧手段を付設して密閉し、焼結用の炉に成形型を設置し、炉内で減圧手段により成形型内を減圧してから、減圧を止め、あるいは、更に減圧を続けながら、チタン系粉を加熱して焼結させる方法、
(3)チタン系粉を成形型に載置した後、成形型を焼結用の炉内に設置し、成形型ごと炉内を減圧してから、減圧を止め、あるいは、更に減圧を続けながら、チタン系粉を加熱して焼結させる方法、が挙げられる。
なお、測定に際し、平均円形度については、PITA-3(セイシン企業製)を使用して求めた。D50およびD90については、測定装置:LMS-350(セイシン企業製)を使用して、JIS:Z8825:2013に準拠して求めた。
各チタン系粉を乾燥且つ無加圧の条件にて石英製の成形型に充填し、成形型の上端より上にあふれて存在するチタン系粉を擦切った。すなわち、擦切り作業以外の余剰の力はチタン系粉にかかっていない。その後、真空度を少なくとも3.0×10-3Paとした環境下にチタン系粉を充填した成形型を置き、昇温速度15℃/minにて表1に示す焼結温度まで焼結し、1時間焼結した。焼結後は炉冷にて室温まで冷却し、チタン系粉の多孔質焼結体を得た。
得られた多孔質チタン系焼結体を分析に供し、空隙率、平均気孔径、曲げ強度を求めた。結果を表1に示す。
空隙率の測定については、上記計算方法(相対密度から逆算)を使用して求めた。平均気孔径については、マイクロメリティックス社製の水銀圧入法測定装置を使用し、ストレンゲージ式圧力計測法により測定した。曲げ強度については、SHIMADZU社製、万能試験機を使用し、図1に概要を示す方法にて最大荷重を測定し、曲げ強度に換算した。
比較例であるNo.2~5はD90が大きすぎる。よって、製造後の空隙率は十分に確保できているものの本発明で所望する平均気孔径が得られず所望の強度が達成されない。
Claims (3)
- 空隙率が45~65%、平均気孔径が5~15μm、曲げ強度が100MPa以上である、多孔質チタン系焼結体。
- 請求項1に記載の多孔質チタン系焼結体からなる電極。
- 平均円形度が0.93以下であり、粒度分布測定により得られるD90:25μm以下のチタン系粉を、乾式且つ実質的に無加圧で、成形型中に載置させ、次いで、850℃以上950℃未満で焼結させる工程を含む、多孔質チタン焼結体の製造方法。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022064898A1 (ja) * | 2020-09-28 | 2022-03-31 | 東邦チタニウム株式会社 | チタン系多孔質体及び、チタン系多孔質体の製造方法 |
EP3914754B1 (en) | 2019-01-23 | 2023-09-20 | Paul Scherrer Institut | Electrochemical cell having porous transport layer based on multiple micro and nano sintered porous layers |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5128507A (ja) * | 1974-09-04 | 1976-03-10 | Shoketsu Kinzoku Kogyo Kk | Shoketsukinzokufuiruta no seizohoho |
JP2002066229A (ja) | 2000-08-25 | 2002-03-05 | Sumitomo Sitix Of Amagasaki Inc | 焼結チタンフィルタ及びその製造方法 |
JP2002239321A (ja) * | 2001-02-16 | 2002-08-27 | Sumitomo Titanium Corp | 高耐食性金属焼結フィルタ |
JP2002317207A (ja) * | 2001-04-19 | 2002-10-31 | Sumitomo Titanium Corp | チタン粉末焼結体 |
JP2012172179A (ja) | 2011-02-18 | 2012-09-10 | Toho Titanium Co Ltd | チタン焼結多孔体およびその製造方法 |
JP2018070985A (ja) * | 2016-11-04 | 2018-05-10 | 東邦チタニウム株式会社 | チタン系多孔体及びその製造方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04176309A (ja) * | 1990-11-09 | 1992-06-24 | Nkk Corp | プリコート濾過用フィルターエレメント及びその洗浄方法 |
JP3038397B2 (ja) * | 1991-06-11 | 2000-05-08 | 石川島播磨重工業株式会社 | 多孔質インプラント材 |
CN1846907B (zh) * | 2001-02-16 | 2010-12-08 | 株式会社大阪钛技术 | 多孔质导电板 |
JP2004149842A (ja) * | 2002-10-30 | 2004-05-27 | Sumitomo Titanium Corp | チタン焼結体の製造方法 |
US20080199720A1 (en) * | 2007-02-21 | 2008-08-21 | Depuy Products, Inc. | Porous metal foam structures and methods |
JP5573110B2 (ja) * | 2009-11-06 | 2014-08-20 | 三菱マテリアル株式会社 | 電気化学部材用焼結金属シート材及び電気化学部材用焼結金属シート材の製造方法 |
CN101935774B (zh) * | 2009-11-18 | 2012-04-11 | 中国科学院金属研究所 | 一种制备多孔钛及钛合金块体材料的方法 |
CN102205144B (zh) * | 2010-03-31 | 2014-07-16 | 方崇凯 | 医用金属植入材料多孔钽及其制备方法 |
KR102048062B1 (ko) * | 2015-03-05 | 2019-11-22 | 도호 티타늄 가부시키가이샤 | 티탄계 분말 및 그 용제품, 소결품 |
-
2019
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5128507A (ja) * | 1974-09-04 | 1976-03-10 | Shoketsu Kinzoku Kogyo Kk | Shoketsukinzokufuiruta no seizohoho |
JP2002066229A (ja) | 2000-08-25 | 2002-03-05 | Sumitomo Sitix Of Amagasaki Inc | 焼結チタンフィルタ及びその製造方法 |
JP2002239321A (ja) * | 2001-02-16 | 2002-08-27 | Sumitomo Titanium Corp | 高耐食性金属焼結フィルタ |
JP2002317207A (ja) * | 2001-04-19 | 2002-10-31 | Sumitomo Titanium Corp | チタン粉末焼結体 |
JP2012172179A (ja) | 2011-02-18 | 2012-09-10 | Toho Titanium Co Ltd | チタン焼結多孔体およびその製造方法 |
JP2018070985A (ja) * | 2016-11-04 | 2018-05-10 | 東邦チタニウム株式会社 | チタン系多孔体及びその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP3778074A4 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3914754B1 (en) | 2019-01-23 | 2023-09-20 | Paul Scherrer Institut | Electrochemical cell having porous transport layer based on multiple micro and nano sintered porous layers |
WO2022064898A1 (ja) * | 2020-09-28 | 2022-03-31 | 東邦チタニウム株式会社 | チタン系多孔質体及び、チタン系多孔質体の製造方法 |
JP7061735B1 (ja) * | 2020-09-28 | 2022-04-28 | 東邦チタニウム株式会社 | チタン系多孔質体及び、チタン系多孔質体の製造方法 |
AU2021350813B2 (en) * | 2020-09-28 | 2024-02-22 | Toho Titanium Co.,Ltd. | Titanium-based porous body and method for producing titanium-based porous body |
EP4219778A4 (en) * | 2020-09-28 | 2024-04-24 | Toho Titanium CO., LTD. | TITANIUM-BASED POROUS BODY AND METHOD FOR PRODUCING A TITANIUM-BASED POROUS BODY |
US11975388B2 (en) | 2020-09-28 | 2024-05-07 | Toho Titanium Co., Ltd. | Titanium-based porous body and method for producing titanium-based porous body |
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