WO2010056077A9 - Poudre de revêtement de haute dureté, et procédé d'élaboration correspondant - Google Patents

Poudre de revêtement de haute dureté, et procédé d'élaboration correspondant Download PDF

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Publication number
WO2010056077A9
WO2010056077A9 PCT/KR2009/006719 KR2009006719W WO2010056077A9 WO 2010056077 A9 WO2010056077 A9 WO 2010056077A9 KR 2009006719 W KR2009006719 W KR 2009006719W WO 2010056077 A9 WO2010056077 A9 WO 2010056077A9
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Prior art keywords
powder
salt
high hardness
base material
producing
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PCT/KR2009/006719
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English (en)
Korean (ko)
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WO2010056077A2 (fr
WO2010056077A3 (fr
Inventor
박희섭
류민호
엠 다우쉬왈리드
홍순형
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일진다이아몬드(주)
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Publication of WO2010056077A2 publication Critical patent/WO2010056077A2/fr
Publication of WO2010056077A3 publication Critical patent/WO2010056077A3/fr
Publication of WO2010056077A9 publication Critical patent/WO2010056077A9/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/36—Compounds of titanium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82B—NANOSTRUCTURES FORMED BY MANIPULATION OF INDIVIDUAL ATOMS, MOLECULES, OR LIMITED COLLECTIONS OF ATOMS OR MOLECULES AS DISCRETE UNITS; MANUFACTURE OR TREATMENT THEREOF
    • B82B3/00—Manufacture or treatment of nanostructures by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values

Definitions

  • the present invention relates to a high hardness coating powder and a method for producing the same, and more particularly, to a method for easily coating a coating material on the surface of a base material and a powder produced by the method.
  • the cutting tool wears as the cutting process continues.
  • the cutting tool is therefore formed using a hard material.
  • a cutting tool is formed by mixing and sintering a base metal such as diamond and a metal.
  • the bonding force between the base metal and the metal is important for the durability of the cutting tool.
  • the sintering temperature is a high temperature, high temperature safety of the base material and prevention of oxidation of the base material surface are important.
  • the surface of the base material can be coated to prevent oxidation, to improve the bonding strength with the metal, and to improve the high temperature safety.
  • the base material agglomerates during the process of coating the coating material on the surface of the base material, and the coating material is unevenly coated on the surface of the base material, thereby coating the high hardness coating powder. There was a limit to getting.
  • This invention can provide the high hardness coating powder which can coat
  • the present invention comprises the steps of (a) dissolving the first salt of chlorine (Cl) series, the second salt of fluorine (F) series in a solvent to form a solution, (b) a coating material containing a base material and titanium in the solution Mixing and drying, (c) placing the mixture obtained in step (b) into a reactor and (d) maintaining the reactor after heating to a predetermined temperature to melt the first salt and the second salt.
  • a method for preparing a high hardness coating powder comprising the step of causing a molten salt reaction to occur.
  • the first salt may include at least two selected from the group consisting of KCl, NaCl, and BaCl 2.
  • the second salt may include at least one selected from the group consisting of NaF, K 2 TiF 6 and NaK 2 TiF 6 .
  • the solvent may include ethanol.
  • the step (d) may proceed at 800 °C to 1000 °C.
  • the step (d) may proceed with the reaction while stirring the inside of the reactor in an Ar gas atmosphere.
  • the step (d) may be followed by the step of sonicating the powder obtained after the molten salt reaction in the reactor in distilled water and reacting with a hydrochloric acid solution.
  • step (d) may further comprise the step of removing the remaining coating material by a wet filling method.
  • step (d) may include the step of proceeding the crystallization by heat treatment in a hydrogen atmosphere.
  • the base material powder may include one selected from the group consisting of diamond, cubic boron nitride, and carbon nanotubes.
  • the high hardness coating powder and the manufacturing method thereof according to the present invention can uniformly coat the coating material on the surface of the base material including the fine particles to obtain a high hardness coating powder having improved strength, improved surface properties and excellent high temperature safety.
  • FIG. 1 is a flowchart sequentially illustrating a method for producing a high hardness coated powder of the present invention.
  • FIG. 2 is a diagram schematically illustrating an apparatus for describing the manufacturing method of FIG. 1 of FIG. 1.
  • FIG. 3 is an enlarged view of a portion A of FIG. 1.
  • FIG. 4 is a photograph obtained by measuring an electron microscope of a powder formed according to a method of preparing a high hardness coating powder according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating an X-ray diffraction pattern of the powder of FIG. 4.
  • FIG. 6 is a diagram of a powder formed according to a method for preparing high hardness coated powder according to another embodiment of the present invention, measured by an electron microscope.
  • FIG. 6 is a diagram of a powder formed according to a method for preparing high hardness coated powder according to another embodiment of the present invention, measured by an electron microscope.
  • FIG. 7 is a diagram illustrating an X-ray diffraction pattern of the powder of FIG. 6.
  • FIG. 8 is a cross-sectional view of the powder of FIG. 6 using a focused ion beam (FIB).
  • FIB focused ion beam
  • FIG. 9 is a cross-sectional view of the powder of FIG. 6 using a transmission electron microscope (TEM).
  • TEM transmission electron microscope
  • FIG. 10 is a diagram illustrating a measured component of part B of FIG. 9.
  • FIG. 11 is a cross-sectional view of the powder of FIG. 6 after heat treatment using a transmission electron microscope.
  • FIG. 12 illustrates the limited field of view diffraction pattern of FIG. 11.
  • FIG. 14 is a view of a powder formed by a transmission electron microscope of a powder formed according to a method for producing a high hardness coated powder according to another embodiment of the present invention.
  • FIG. 15 is an enlarged view of C of FIG. 14.
  • FIG. 16 is a diagram illustrating a limited field of view diffraction pattern of the powder of FIG. 14.
  • stirrer 205 gas inlet
  • FIG. 1 is a flow chart sequentially showing a method for producing a high hardness coating powder of the present invention and FIG. 2 is a view schematically showing an apparatus for explaining the manufacturing method of FIG. 1 of FIG.
  • the first salt and the second salt are dissolved in a solvent to form a solution (101), and the base material and the coating material are mixed in a solution (102). ), Drying (103), placing the dried mixture into the reactor (104), heating and maintaining the reactor (105), removing residual salt (106), removing the residual coating material 107 and heat treating step 108.
  • the first salt is a chlorine-based salt and includes at least two selected from the group consisting of KCl, NaCl and BaCl 2.
  • two or more salts are selected to lower the melting temperature and ensure uniform distribution of the molten salt and high temperature safety.
  • the first salt may comprise two or more salts. That is, the first salt may be KCl and NaCl, NaCl and BaCl 2, and KCl and BaCl 2.
  • the first salt may also be KCL and NaCl and BaCl 2.
  • the second salt comprises at least one selected from the group consisting of NaF, K 2 TiF 6 and NaK 2 TiF 6 .
  • the base material has particles of several micrometers or less and can be formed by using various materials.
  • the base material includes any one selected from the group consisting of diamond, cubic boron nitride, and carbon nanotubes having excellent hardness.
  • the coating includes titanium. Titanium is coated on the surface of the base material particles containing diamond to prevent oxidation of the surface of the base material particles, to ensure safety at high temperatures, and to improve the bonding force between the base powder and the metal powder in forming a cutting tool later.
  • the coating can be prepared in various forms. That is, the coating material may be in the form of powder, foil, pellets. However, the coating material is preferably in the form of a powder so that uniform melting occurs easily in the reactor.
  • the second salt is dissolved in a solvent to form a solution.
  • the solvent may be ethanol.
  • the base metal powder containing diamond is then added to the solution and the coating material containing titanium is added to the solution.
  • This mixed solution is then stirred to make it homogeneous and dried to form a mixed powder.
  • the particle size of the base metal powder containing diamond is several micrometers or less. Preferably they are 5 nanometers or more and 5 micrometers or less.
  • the particle size of the base metal powder containing diamond is preferably 5 nanometers or more.
  • the particle size of the base metal powder containing diamond exceeds 5 micrometers, the toughness of the cutting tool is reduced when forming the cutting tool using the base material. Therefore, the particle size of the base metal powder containing diamond is preferably 5 micrometers or less.
  • the base material particles agglomerate with each other by van der Waals' force in the process of coating the surface of the base material particles with a coating material.
  • the second salt, the base material and the coating material are dissolved by using ethanol to form a solution.
  • a uniform dispersion of each particle occurs during the process of forming the solution and then stirring it evenly.
  • FIG. 2 schematically illustrates a reactor in which mixed powder is added and a process is performed.
  • the reactor 200 includes an electric furnace 201, a crucible 202, a thermocouple 203, an agitator 204, a gas inlet 204, and a gas outlet 205.
  • the mixed powder described above is placed in the crucible 202.
  • the mixed powder in the crucible 202 may be melted by supplying heat from the electric furnace 201 surrounding the crucible 202.
  • the electric furnace 201 is a method of supplying heat using electric energy.
  • the present invention is not limited thereto, and various types of heat sources may be used as long as the heat necessary for melting the mixed powder of the crucible 202 can be supplied.
  • the thermocouple 203 may be used to measure the temperature in the process of melting and stirring the mixed powder and to adjust the heat supply amount of the electric furnace 201 for supplying heat to the crucible 202.
  • the mixed powder is melted so that the reaction of melting the first salt and the second salt occurs at 800 ° C to 1000 ° C.
  • the melting temperature of a 1st salt, a 2nd salt is about 600 degreeC or more.
  • the reaction rate due to diffusion of titanium atoms when the coating material containing titanium is melted is proportional to the temperature.
  • the reaction rate due to diffusion of titanium atoms is reduced, and the uniformity of the coating layer formed after the coating material is coated on the base material is reduced. Therefore, the reaction in which the mixed powder is melted to melt the first salt and the second salt is controlled to occur at 800 ° C. or higher.
  • the stirrer 204 allows the first salt, the second salt, the base material and the coating material to be evenly stirred when the mixed powder is melted.
  • the stirrer 204 preferably has the form of an impeller.
  • Argon (Ar) gas is introduced and discharged through the gas inlet 205 and the gas outlet 206. Through this, the melting reaction of the mixed powder in the crucible may proceed in an inert atmosphere.
  • FIG. 3 is an enlarged view of A of FIG. 2. Referring to FIG. 3, the base material 320 and the coating material 330 are evenly distributed in the molten salt 310 in which the first salt and the second salt are melted.
  • the mixed powder is melted and maintained for a period of time, and the coating material is oxidized and reduced in a molten salt to coat the coating material on the surface of the base material. Specifically, the following reactions occur sequentially.
  • the coating material is melted in the molten salt in which the first salt and the second salt are molten to cause a reaction in the above reaction (1).
  • the reaction of Ti + Ti 4+ -> 2Ti 2 occurs in the molten salt because the second salt forms tetravalent titanium ions.
  • reaction of (3) occurs on the surface of the base material. That is, diamond and titanium react at a high temperature on the surface of the particles of the base metal including diamond to form titanium carbide. That is, the coating powder which coat
  • the coated powder recovered from the crucible 202 is in a lump state immediately after the high temperature melting process is finished. In addition, since the remaining salts and coating materials aggregate together with the coating powder without reacting with the base metal in the melting process, a process of separating these is necessary.
  • the coating powder, the remaining salt and the powder containing the remaining coating material are put in distilled water and stirred. Ultrasonication is then performed to remove any remaining salt. At this time, after the sonication, a hydrochloric acid solution may be added to proceed the process quickly and easily.
  • the remaining coating material powder can be easily removed through the wet coloring.
  • the remaining titanium powder and the coating powder are agglomerated in a liquid such as distilled water to fill the liquid powder to remove the remaining titanium powder.
  • the coated powder is then recovered by vacuum filtering. That is, the diamond powder coated with titanium is recovered.
  • the recovered coating powder is heat-treated after drying in a vacuum atmosphere.
  • the heat treatment is performed in a hydrogen atmosphere at a temperature of 800 ° C. or higher. Through this, titanium carbide formed on the surface of the base material is crystallized, and adhesion between the base material and the coating material is improved and durability is improved.
  • FIG. 4 is a photograph obtained by measuring an electron microscope of a powder formed according to a method of preparing a high hardness coated powder according to an embodiment of the present invention
  • FIG. 5 is an X-ray diffraction pattern of the powder of FIG. 4. Drawing.
  • KCl, NaCl and BaCl 2 were used as the first salt, and NaF and NaK 2 TiF 6 were used as the second salt.
  • KCl, NaCl and BaCl 2 were each prepared with 10 g, and 10 g of NaF and 5 g of NaK 2 TiF 6 were prepared.
  • the base material contains diamond, and the diamond particles have a size of 1.5 micrometers or less.
  • the coating material was prepared 2g of titanium in powder form and the titanium powder was to have a particle size of 100mesh.
  • FIG. 4 (a) is a diamond powder before using the manufacturing method according to the present embodiment
  • Figure 4 (b) is a diamond powder coated with a coating material by the manufacturing method according to the present embodiment
  • Figure 4 (c) Is a scanning electron microscope (SEM) photograph which shows enlarged FIG. 4 (b).
  • Fig. 5 (a) shows the diamond powder before coating by the manufacturing method according to the present embodiment
  • Fig. 5 (b) shows the diamond powder after coating with the manufacturing method according to the present embodiment.
  • the peaks indicated by the inverted triangle are present in both (a) and (b) of FIG. 5, indicating the diamond component.
  • the peaks indicated by circles are present only in Fig. 5 (b), which indicates titanium carbide.
  • FIG. 6 is a diagram illustrating a powder formed according to a method of preparing a high hardness coated powder according to another embodiment of the present invention with an electron microscope
  • FIG. 7 is a diagram illustrating an X-ray diffraction pattern of the powder of FIG. 6.
  • This embodiment has a difference in that the base material using cubic boron nitride rather than diamond as compared with the above-described embodiment.
  • first and second salts are dissolved in a solvent to form a solution.
  • the solvent may be ethanol.
  • the base metal powder containing cubic boron nitride is put into the solution, and the coating material containing titanium is put into the solution.
  • This mixed solution is then stirred to make it homogeneous and dried to form a mixed powder.
  • the particle size of the base metal powder containing cubic boron nitride is several micrometers or less. Preferably they are 50 nanometers or more and 5 micrometers or less.
  • the particle size of the base metal powder containing cubic boron nitride is preferably 50 nanometers or more.
  • the particle size of the base metal powder containing cubic boron nitride is preferably 5 micrometers or less.
  • the mixed powder is melted and maintained for a period of time, so that the coating material is oxidized and reduced in the molten salt so that the coating material is coated on the surface of the base material. Specifically, the following reactions occur.
  • the coating material is melted in the molten salt in which the first salt and the second salt are molten to cause a reaction in the above reaction (1).
  • the reaction of Ti + Ti 4+ -> 2Ti 2 occurs in the molten salt because the second salt forms tetravalent titanium ions.
  • reaction occurs in the above reaction on the surface of the base metal powder. That is, titanium divalent ions formed in the molten salt are reduced on the surface of the base material.
  • reaction of (3) occurs on the surface of the base material. That is, boron and titanium, nitrogen and titanium react at a high temperature on the surface of the base material particles containing cubic boron nitride to form titanium boride and titanium nitride.
  • FIG. 6 (a) is a cubic boron nitride powder before using the manufacturing method according to the present embodiment
  • Figure 6 (b) is a cubic boron nitride powder coated with a coating material in the manufacturing method according to the present embodiment
  • Fig. 6 (c) is a scanning electron microscope (SEM) photograph showing an enlarged view of FIG. 6 (b).
  • FIG. 7 shows a cubic boron nitride powder before coating by the manufacturing method which concerns on a present Example
  • FIG. 7 (b) shows the cubic boron nitride powder after coating by a manufacturing method which concerns on a present Example.
  • the peaks indicated by the inverted triangle are present in both (a) and (b) of FIG. 7, indicating a cubic boron nitride component.
  • the peaks indicated by circles are present only in FIG. 7B, which indicates titanium nitride.
  • FIG. 8 is a cross-sectional view of the powder of FIG. 6 using a focused ion beam (FIB).
  • FIB focused ion beam
  • a coating layer containing titanium formed on the surface of the cubic boron nitride is uniformly formed.
  • a part indicated by a) is a layer for protecting the surface of the sample from the focused ion beam FIB with a protective layer formed of platinum Pt for experiment.
  • Figure 8 b) is the coating layer and in Figure 8 c) is the base material.
  • the coating layer has a thickness of 200 nm.
  • FIG. 9 is a diagram illustrating a cross section of the powder of FIG. 6 using a transmission electron microscope (TEM), and FIG. 10 is a diagram illustrating a component of part B of FIG. 9.
  • TEM transmission electron microscope
  • FIG. 9 shows a base material part, (c) shows a covering layer part, and (b) shows the boundary of a base material and a covering layer. It is a graph which shows the component analysis result of each part.
  • (a) is boron, (b) is nitrogen, (c) is oxygen, and (d) is titanium.
  • the base material includes a cubic boron nitride, nitrogen, boron is the main component.
  • titanium as a coating material increases, and titanium is most present at the coating layer (c).
  • FIG. 11 is a cross-sectional view of the powder of FIG. 6 after heat treatment using a transmission electron microscope
  • FIG. 12 is a view illustrating the limited field diffraction pattern of FIG. 11.
  • a) indicates the base material
  • b) indicates the coating layer.
  • the titanium containing coating layer has a polycrystalline structure composed of crystals having a size of several tens of nanometers or less.
  • the left Y-axis coordinate of FIG. 13 indicates that the heat flux is measured by differential scanning calorimetry (DSC), and shows that the heat flux decreases as the temperature increases, and the right Y-axis of FIG.
  • the coordinates are values obtained by differentiating the heat flow rate value of the left Y coordinate, and change in value according to a minute temperature change.
  • the glass transition temperature is about 950 °C. This means that the coating layer containing titanium on the cubic boron nitride surface was crystallized at around 950 ° C in an amorphous state.
  • the present invention can easily form a coating layer crystallized as described above by heat-treating the coated base material powder in a hydrogen atmosphere.
  • FIG. 14 is a view of a powder formed according to a method of preparing a high hardness coated powder according to another embodiment of the present invention with a transmission electron microscope
  • FIG. 15 is an enlarged view of C of FIG. 14.
  • FIG. 16 is a diagram illustrating a limited field of view diffraction pattern of the powder of FIG. 14.
  • This embodiment has a difference in that the base material using carbon nanotubes other than diamond or cubic boron nitride as compared with the above-described embodiment.
  • first and second salts are dissolved in a solvent to form a solution.
  • the solvent may be ethanol.
  • the base material containing the carbon nanotubes is then added to the solution and the coating material containing titanium is added to the solution.
  • This mixed solution is then stirred to make it homogeneous and dried to form a mixed powder.
  • the particle size of the base metal powder containing the carbon nanotubes is several micrometers or less. Preferably they are 5 nanometers or more and 50 nanometers or less.
  • the particle size of the base metal powder containing carbon nanotubes is less than 5 nanometers, the base metal powder particles are not dispersed well due to van der Waals' forces between the respective base metal powder particles, and aggregation occurs between the particles. There is a limit to coating the coating material. Therefore, the particle size of the base metal powder containing diamond is preferably 5 nanometers or more.
  • the particle size of the base metal powder containing the carbon nanotubes is preferably 5 micrometers or less.
  • the mixed powder is melted and maintained for a period of time so that the coating material undergoes oxidation and reduction reactions in the molten salt so that the coating material is coated on the surface of the base material. Specifically, the following reactions occur.
  • the coating material is melted in the molten salt in which the first salt and the second salt are molten to cause a reaction in the above reaction (1).
  • the reaction of Ti + Ti 4+ -> 2Ti 2 occurs in the molten salt because the second salt forms tetravalent titanium ions.
  • reaction occurs in the above reaction on the surface of the base metal powder. That is, titanium divalent ions formed in the molten salt are reduced on the surface of the base material.
  • reaction of (3) occurs on the surface of the base material. That is, carbon and titanium react at a high temperature on the surface of the particles of the base metal including the carbon nanotubes to form titanium carbide.
  • a coating layer is formed on the surface of the carbon nanotube as the base material.
  • the titanium-containing coating material is coated on the surface of the carbon nanotube to form titanium carbide in the coating layer.
  • titanium was evenly coated on the surface of the fine cubic boron nitride particles by the manufacturing method according to the present embodiment.
  • Carbon nanotubes have been studied for use in cutting tools as materials having high strength, high modulus of elasticity, high conductivity, and high thermal conductivity. However, when carbon nanotubes are used as the base material, evenly dispersed and bonding strength at the interface with the coating material is a problem.
  • the coating material containing titanium can be uniformly coat

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Abstract

La présente invention concerne un procédé permettant d'élaborer une poudre de revêtement de haute dureté de façon à revêtir facilement la surface d'une base avec un matériau de revêtement. Ce procédé consiste (a) à dissoudre un premier sel de chlore (Cl) et un second sel de fluore (F) dans un solvant de façon à obtenir une solution, (b) à mélanger à la solution une base et un matériau de revêtement contenant du titane, puis à faire sécher le mélange, (c) à mettre dans un four de réaction le mélange obtenu en (b), et (d) à chauffer le four de réaction à une température prédéterminée, et maintenir le four de réaction à ladite température prédéterminée de façon à provoquer une réaction des sels fondus, ledit premier sel et ledit second sel étant fondus. L'invention concerne également une poudre de revêtement de haute dureté obtenue selon le procédé.
PCT/KR2009/006719 2008-11-14 2009-11-16 Poudre de revêtement de haute dureté, et procédé d'élaboration correspondant WO2010056077A2 (fr)

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KR102318672B1 (ko) 2019-10-29 2021-11-01 (주)에디코 입방정 질화붕소 입자 및 그 제조방법
EP3868732B1 (fr) 2020-02-19 2023-06-28 Adico Particule de nitrure de bore cubique revetue et son procédé de fabrication
CN114150364B (zh) * 2021-12-03 2023-10-27 长安大学 一种金刚石表面改性的方法
CN116675998B (zh) * 2023-05-31 2024-05-31 东北大学 用于铝锂合金高温热处理防脱锂涂料及其制备方法

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US5106392A (en) * 1991-03-14 1992-04-21 General Electric Company Multigrain abrasive particles
JP2002317196A (ja) * 2001-04-19 2002-10-31 Minebea Co Ltd 研磨洗浄組成物
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