CN110625111A - Preparation method for coating metal on surface of ceramic particle - Google Patents
Preparation method for coating metal on surface of ceramic particle Download PDFInfo
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- CN110625111A CN110625111A CN201910969140.2A CN201910969140A CN110625111A CN 110625111 A CN110625111 A CN 110625111A CN 201910969140 A CN201910969140 A CN 201910969140A CN 110625111 A CN110625111 A CN 110625111A
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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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
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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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
- B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
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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
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Chemical & Material Sciences (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention relates to a preparation method of coating metal on the surface of ceramic particles, belonging to the field of metal-ceramic compounding. The method comprises alkali treatment, acid treatment, coating treatment and mixing, wherein in the coating treatment, ceramic powder, metal powder and NH4The mass ratio of Cl to metal hydride is (80 ~ 95): (12 ~ 25): (8 ~ 20): 15 ~ 25), the mass ratio of ceramic powder and metal powder is (40 ~ 70): 30 ~ 60, the invention firstly washes ceramic particles with alkali and acid, namely carries out activation treatmentThen mixing with metal powder and NH4Uniformly mixing Cl and metal hydride, carrying out vacuum reaction treatment, and coating a layer of metal on the surface of the ceramic particles; thereby avoiding oxidation, improving the wetting and compatibility with metal and keeping the characteristics of high hardness, friction and abrasion resistance and chemical corrosion resistance of the ceramic. The invention has the advantages of simple process, low equipment requirement and convenient batch production.
Description
Technical Field
The invention belongs to the field of preparation of metal-ceramic composite powder, and particularly relates to a preparation method for coating metal on the surface of ceramic particles.
Background
The ceramic material has the characteristics of high hardness, high strength, friction and wear resistance, chemical corrosion resistance and high-temperature oxidation resistance, plays a role in lifting the weight in the coating field, the ceramic powder and the metal powder are uniformly mixed, and the mixed powder is coated on the surface of the metal part through equipment such as supersonic flame spraying, atmospheric plasma spraying, laser cladding and the like, so that the wear resistance and corrosion resistance of the metal part are improved, the mechanical property and the high-temperature oxidation resistance can be improved, and the ceramic material has very high practical value in the fields of mining, metallurgy, machinery, transportation, aerospace, war industry and the like.
However, since the ceramic particles are often poor in wettability with metals, the non-oxidized ceramic particles are exposed to air and are very easy to oxidize during the coating formation process, and the differences between the non-oxidized ceramic particles and the metal matrix and the metal powder in terms of thermal expansion coefficient, elastic modulus and compatibility are large, so that the coating is easy to deform, crack, peel and the like, and the comprehensive performance of the coating is reduced.
Chinese patent with publication number CN107500769A provides a C-TiB2The surface treatment process of composite material is combined with preparation process, i.e. firstly, a layer of B is deposited on the surface of composite material4C, then obtaining TiSi by reacting Ti powder with residual silicon2To reduce the residual silicon content or to remove it completely, and also to contact the surface B4C reacting to obtain TiB2Further stabilizing the inherent properties of the composite material, but not increasingThe wear resistance and corrosion resistance of the metal coating can not be improved, the mechanical property and the high-temperature oxidation resistance can not be improved, and the problems of deformation, cracking, peeling and the like of the coating can not be solved.
In summary, the existing method for coating metal on the surface of ceramic material has the following defects: (1) the wettability of the ceramic and the metal is not enough, and the surface energy of the wrapped ceramic is low; (2) the bonding performance of metal and ceramic is weak; (3) the hardness of the metal coating wrapped on the surface of the ceramic is not high, the coating is easy to wear and lose, and the comprehensive performance of the coating is low.
Disclosure of Invention
The invention aims at the problems and provides a preparation method of coating metal on the surface of ceramic particles, so as to realize the following purposes:
(1) the preparation method for coating the metal on the surface of the ceramic particle improves the wettability of the ceramic and the metal;
(2) according to the preparation method for coating the metal on the surface of the ceramic particle, the bonding performance of the metal and the ceramic is improved;
(3) according to the preparation method of the ceramic particle surface-coated metal, the coated metal coating retains the characteristics of high hardness, friction and wear resistance and chemical corrosion resistance of ceramic;
(4) according to the preparation method of the metal-coated ceramic particle surface, the obtained metal layer coating coated on the ceramic particle surface has high micro Vickers hardness, low wear rate and high comprehensive performance.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention relates to a preparation method of coating metal on the surface of ceramic particles, which is characterized in that,
the method comprises alkali treatment, acid treatment, coating treatment and mixing.
The following are preferred for the technical solution of the present invention:
the invention relates to a preparation method of coating metal on the surface of ceramic particles, which is characterized in that,
the method comprises alkali treatment, acid treatment, coating treatment, washing, mixing and coating.
The invention discloses a preparation method of coating metal on the surface of ceramic particles, which is characterized by comprising the following steps:
(1) alkali treatment, namely pouring ceramic powder into an alkali solution, ultrasonically cleaning for 30 ~ 90min, washing with deionized water until the ceramic powder is neutral, and then drying in a drying oven at 60 ~ 200 ℃;
(2) acid treatment, namely pouring ceramic powder into an acid solution, performing ultrasonic cleaning for 30 ~ 90min, washing the ceramic powder until the ceramic powder is neutral by using deionized water, and then drying the ceramic powder in a drying oven at 60 ~ 200 ℃;
(3) and (3) wrapping treatment: mixing ceramic powder, metal powder and NH4Uniformly mixing Cl and metal hydride, putting into a horizontal tubular furnace, and carrying out vacuum reaction at 700 ~ 1100 ℃ for 1 ~ 5 h;
(4) washing, namely screening the ceramic powder, washing the ceramic powder for 3 ~ 7 times by using absolute ethyl alcohol and deionized water respectively, and then putting the ceramic powder into a drying oven for drying at 60 ~ 200 ℃;
(5) mixing: uniformly mixing ceramic powder and metal powder to prepare metal-ceramic composite powder;
(6) preparing a coating: and forming a coating with a certain thickness on the surface of the metal matrix by using special equipment for the surface engineering technology.
In the alkali treatment, the ceramic may be a carbide ceramic, a boride ceramic, a nitride ceramic or an oxide ceramic.
In the alkali treatment, the average sphere diameter of the ceramic is more than 20 μm, and the purity is more than 98%.
In the alkali treatment, the carbide ceramic is SiC or B4C、TiC、ZrC、VC、WC、TaC、NbC、Cr3C2。
In the alkali treatment, the boride ceramic is TiB2、ZrB2、B2V、WB2、TaB2、NbB2、CrB2、HfB2。
In the alkali treatment, the nitride ceramic is Si3N4、BN、AlN、TiN、W2N、ZrN。
In the alkali treatment, the oxide ceramic is Al2O3、ZrO2。
In the alkali treatment, the main components of the alkali solution are NaOH and Na2CO3、Na3PO4、Na2SiO3。
In the above acid treatment, the acid solution mainly contains HCl and HNO3、H2SO4。
In the coating treatment, the metal powder is Ti powder, Fe powder, Cu powder, Ni powder and Co powder.
In the coating treatment, the average particle size of the metal powder is less than 10 μm, and the purity is more than 99%.
In the above wrapping treatment, NH4Cl for analytical purity A.R and metal hydride for TiH2、NiH、CuH、CrH2The purity is more than 99.5 percent.
In the above coating treatment, the melting point of the metal hydride is lower than 1668 ℃ and lower than 2000 ℃.
In the coating treatment, the ceramic powder is at least one of carbide ceramic, boride ceramic, nitride ceramic and oxide ceramic.
In the coating treatment, the metal powder is at least one of Ti powder, Fe powder, Cu powder, Ni powder and Co powder.
In the above wrapping treatment, the metal hydride is at least TiH2、NiH、CuH、CrH2One kind of (1).
In the coating treatment, the carbide ceramics are SiC and B4C、TiC、ZrC、VC、WC、TaC、NbC、Cr3C2。
In the above wrapping treatment, the boride ceramic is TiB2、ZrB2、B2V、WB2、TaB2、NbB2、CrB2、HfB2。
In the above coating treatment, the nitride ceramic is Si3N4、BN、AlN、TiN、W2N、ZrN。
In the above coating treatment, the oxide ceramic is Al2O3、ZrO2One kind of (1).
In the coating treatment, the metal powder is at least one of Ti powder, Fe powder, Cu powder, Ni powder and Co powder.
In the above wrapping treatment, the metal hydride is at least TiH2、NiH、CuH、CrH2One kind of (1).
In the coating treatment, ceramic powder, metal powder and NH are mixed4The mass ratio of Cl to the metal hydride is (80 ~ 95): (12 ~ 25): (8 ~ 20): 15 ~ 25).
In the above washing, the mesh size of the sieve was 625 ~ 1250 mesh.
In the mixing, the metal powder is at least one of Ti powder, Fe powder, Cu powder, Ni powder and Co powder.
In the mixing, the mass ratio of the ceramic powder to the metal powder is (40 ~ 70): (30 ~ 60).
In the preparation of the coating, the special equipment for the surface engineering technology comprises supersonic flame spraying equipment, atmospheric plasma spraying equipment, laser cladding equipment and the like.
The invention relates to a preparation method of coating metal on the surface of ceramic particles, which is characterized in that a metal coating (NH in raw materials) is coated on the surface of ceramic powder particles in advance4Cl is thermally decomposed to form NH3HCl, reaction of the metal with HCl H2And metal chlorides which are further substituted by H2And H generated by decomposition of metal hydride2Reducing into gaseous metal atoms, and uniformly coating the gaseous metal atoms on the surface of the ceramic particles. The coating process is a metal further purification process, can show the bonding performance of metal and ceramic), then is uniformly mixed with metal powder, and the mixed powder is coated on the surface of a metal part through equipment such as supersonic flame spraying, atmospheric plasma spraying, laser cladding and the like, so that the wettability of the metal powder can be well improved, the phenomenon of contact oxidation of a non-metal oxide and air is avoided, the problems of deformation, cracking, peeling and the like of the coating are solved, and the comprehensive performance of the coating is greatly improved.
The invention relates to a preparation method of coating metal on the surface of ceramic particles, which comprises the step of coating the ceramic particles with metalThe granules are pretreated by alkali washing and acid washing, and are mixed with metal powder and NH4Cl and metal hydride are uniformly mixed and then put into a horizontal tube furnace for high-temperature vacuum reaction treatment, the treated ceramic particles are screened, washed and dried, and then are uniformly mixed with metal powder to prepare metal-ceramic composite powder, and the composite powder is formed into a coating with a certain uniform thickness and excellent performances such as high hardness, frictional wear resistance, chemical corrosion resistance and the like on the surface of a metal matrix by using special equipment for a surface engineering technology.
Compared with the prior art, the invention has the advantages that:
(1) according to the preparation method for coating the metal on the surface of the ceramic particle, one or more metals are coated on the surface of the ceramic particle, so that the surface energy of the ceramic can be improved, the wettability of the ceramic and the metal is improved, and the phenomenon that the non-oxide ceramic particle is exposed in the air and oxidized in the process of forming a coating is avoided;
(2) the invention relates to a preparation method of coating metal on the surface of ceramic particles, NH4Cl is thermally decomposed to form NH3HCl, reaction of the metal with HCl H2And metal chlorides which are further substituted by H2And H generated by decomposition of metal hydride2Reducing the metal atoms into gaseous metal atoms, uniformly coating the metal atoms on the surface of the ceramic particles, and in the coating process, further purifying the metal, so that the bonding property of the metal and the ceramic can be obviously improved.
(3) According to the preparation method of the metal coated on the surface of the ceramic particle, one or more ceramic powders and one or more metal powders are prepared into mixed powder, so that the difference of the mixed powder and a metal matrix in thermal expansion coefficient, elastic modulus and compatibility can be optimized, and the problems of deformation, cracking, peeling and the like of a coating are avoided, so that the coating keeps the characteristics of high hardness, friction and wear resistance and chemical corrosion resistance of the ceramic.
(4) According to the preparation method of the ceramic particle surface-coated metal, the thickness of the metal layer coated on the surface of the obtained ceramic particle is 1.52-5.5 mu m, the micro Vickers hardness of the coating is 15.63-22.45GPa, and the wear rate of the coating is 2.9-6.8 multiplied by 10-6mm3／N·m。
Drawings
FIG. 1 is TiB of example 1 of the present invention2Scanning electron microscope photos of the ceramics after alkali washing and acid washing;
(a):TiB2the appearance of the ceramic particles is shown,
(b):TiB2the microscopic appearance of the surface of the ceramic particles.
FIG. 2 is a view showing the metal Ti-coated TiB of example 1 of the present invention2Scanning electron microscope photographs of the surfaces of the ceramic particles;
(a):TiB2the macroscopic morphology of the ceramic particles is shown,
(b):TiB2the microscopic shape of the metal Ti particles on the surface of the ceramic particles,
(c) metal Ti coated TiB2Cross-sectional view of the ceramic particles.
FIG. 3 is a scanning electron micrograph of the WC ceramic of example 2 after alkali washing and acid washing;
(a) the appearance of WC ceramic particles is shown in the specification,
(b) the surface microscopic appearance of WC ceramic particles.
FIG. 4 is a scanning electron micrograph of the surface of the metallic Ti-Ni coated WC ceramic particles of example 2 according to the invention; (a) the macroscopic morphology of the WC ceramic particles,
(b) the microscopic morphology of metal Ti-Ni particles on the surface of WC ceramic particles,
(c) sectional view of metal Ti-Ni coated WC ceramic particles.
FIG. 5 shows the metal Ti-Ni coated Si of example 3 of the present invention3N4-Al2O3Scanning electron microscope photographs of the surfaces of the ceramic particles;
(a):Si3N4the macroscopic morphology of the ceramic particles is shown,
(b):Si3N4the microscopic shape of metal Ti-Ni particles on the surface of ceramic particles,
(c):Al2O3the macroscopic morphology of the ceramic particles is shown,
(d):Al2O3the microscopic shape of metal Ti-Ni particles on the surface of ceramic particles.
Detailed Description
The present invention will be further described with reference to the following specific examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
Example 1
A preparation method of coating metal on the surface of ceramic particles comprises the following steps:
(1) mixing TiB2Pouring ceramic powder into an alkali solution, ultrasonically cleaning for 45min, washing with deionized water until the ceramic powder is neutral, and then drying in a drying oven at 120 ℃;
(2) mixing TiB2Pouring the ceramic powder into an acid solution, ultrasonically cleaning for 60min, washing with deionized water until the ceramic powder is neutral, and then drying in a drying oven at 110 ℃;
(3) mixing TiB in certain weight proportion2Ceramic powder, Ti powder and NH4Cl、TiH2Putting the mixture into a horizontal tubular furnace after uniformly mixing the mixture and carrying out vacuum reaction treatment for 3 hours at the temperature of 850 ℃;
(4) sieving ceramic powder with 800 mesh sieve, washing with anhydrous ethanol and deionized water for 4 times respectively, and drying in drying oven at 120 deg.C;
(5) mixing TiB in certain weight proportion2Uniformly mixing ceramic powder and Ni powder =45:55 to prepare metal-ceramic composite powder;
(6) and (3) forming a coating with a certain thickness on the surface of the metal part by using supersonic flame spraying equipment.
After testing, the TiB2The thickness of the metal layer wrapped on the surface of the ceramic particle is 1.52 mu m, the micro Vickers hardness of the coating is 15.63GPa, and the wear rate of the coating is 6.8 multiplied by 10-6mm3／N·m。
Example 2
A preparation method of coating metal on the surface of ceramic particles comprises the following steps:
(1) pouring WC ceramic powder into an alkali solution, ultrasonically cleaning for 60min, washing with deionized water until the solution is neutral, and then drying in a drying oven at 150 ℃;
(2) pouring WC ceramic powder into an acid solution, ultrasonically cleaning for 90min, washing with deionized water until the solution is neutral, and then drying in a drying oven at 120 ℃;
(3) mixing WC ceramic powder, Ti-Ni mixed powder and NH according to the mass ratio4Cl、TiH2Uniformly mixing NiH mixed powder =95:20:15:25, putting the mixture into a horizontal tubular furnace, and carrying out vacuum reaction treatment at 950 ℃ for 2 hours;
(4) sieving ceramic powder with 1250 mesh sieve, washing with anhydrous alcohol and deionized water for 7 times respectively, and drying in a drying oven at 150 deg.C;
(5) uniformly mixing WC ceramic powder and Ti-Ni mixed powder =40:60 by mass ratio to prepare metal-ceramic composite powder;
(6) and forming a coating with a certain thickness on the surface of the metal part by using laser cladding equipment.
Tests show that the thickness of the composite metal layer wrapped on the surface of the WC ceramic particle is 3.29 mu m, the micro Vickers hardness of the coating is 22.45GPa, and the wear rate of the coating is 4.7 multiplied by 10-7mm3／N·m。
Example 3
A preparation method of coating metal on the surface of ceramic particles comprises the following steps:
(1) according to the mass ratio, mixing Si3N4With Al2O3Uniformly mixing ceramic powder =35:65, pouring the mixture into an alkali solution, ultrasonically cleaning the mixture for 90min, washing the mixture by using deionized water until the mixture is neutral, and then drying the mixture in a drying oven at 120 ℃;
(2) mixing Si3N4-Al2O3Pouring the ceramic powder into an acid solution, ultrasonically cleaning for 30min, washing with deionized water until the ceramic powder is neutral, and then drying in a drying oven at 150 ℃;
(3) according to the mass ratio, mixing Si3N4-Al2O3Ceramic powder, Ti-Ni mixed powder and NH4Cl、TiH2Uniformly mixing the mixed powder =90:25:20:15, putting the mixture into a horizontal tubular furnace, and carrying out vacuum reaction treatment for 5 hours at 1050 ℃;
(4) sieving ceramic powder with 1000 mesh sieve, washing with anhydrous ethanol and deionized water for 5 times respectively, and drying in a drying oven at 200 deg.C;
(5) according to the mass ratio, mixing Si3N4-Al2O3Uniformly mixing ceramic powder and Ti powder =50:50 to prepare metal-ceramic composite powder;
(6) and forming a coating with a certain thickness on the surface of the metal part by using the composite powder by using an atmospheric plasma spraying device.
By testing, the Si3N4-Al2O3The thickness of the composite metal layer wrapped on the surface of the ceramic particle is 5.5 mu m, the micro Vickers hardness of the coating is 18.33GPa, and the wear rate of the coating is 2.9 multiplied by 10-7mm3／N·m。
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and various changes may be made in the above embodiment of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.
Claims (10)
1. A preparation method of coating metal on the surface of ceramic particles is characterized in that,
the method comprises alkali treatment, acid treatment, coating treatment and mixing.
2. The method as claimed in claim 1, wherein the coating process comprises coating ceramic powder with metal powder and NH4The mass ratio of Cl to the metal hydride is (80 ~ 95): (12 ~ 25): (8 ~ 20): 15 ~ 25).
3. The method of claim 1, wherein the mixing ratio of the ceramic powder to the metal powder is (40 ~ 70): (30 ~ 60).
4. The method for preparing the ceramic particles coated with the metal according to claim 2, wherein in the coating treatment, the metal powder is Ti powder, Fe powder, Cu powder, Ni powder or Co powder;
the average particle size of the metal powder is less than 10 mu m, and the purity is more than 99 percent.
5. The method according to claim 2, wherein the metal is coated on the surface of the ceramic particle,
the metal hydride is TiH2NiH, CuH or CrH2The purity is more than 99.5 percent.
6. The method of claim 1, wherein the alkali treatment is carried out by using a carbide ceramic, a boride ceramic, a nitride ceramic or an oxide ceramic; the average sphere diameter of the ceramic is more than 20 mu m, and the purity is more than 98 percent.
7. The method of claim 1, wherein the alkali solution is NaOH or Na2CO3、Na3PO4Or Na2SiO3。
8. The method according to claim 1, wherein the acid solution is HCl or HNO3Or H2SO4。
9. The method as claimed in claim 1, wherein the metal powder is at least one of Ti powder, Fe powder, Cu powder, Ni powder, and Co powder.
10. The method according to claim 1, wherein the metal is coated on the surface of the ceramic particle,
the thickness of the metal layer wrapped on the surface of the obtained ceramic particles is 1.52-5.5 mu m, the micro Vickers hardness of the coating is 15.63-22.45GPa, and the coating has good hardnessThe wear rate is 2.9-6.8X 10-6mm3／N·m。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247142A (en) * | 2020-10-21 | 2021-01-22 | 九江学院 | Double-hard-phase double-bonding-phase metal carbide ceramic powder with core-shell structure and preparation method thereof |
| CN113461354A (en) * | 2021-07-01 | 2021-10-01 | 中南大学 | Si with function of improving microwave absorption performance of asphalt concrete pavement3N4Preparation method and application of/Fe composite powder |
| CN113593797A (en) * | 2021-06-02 | 2021-11-02 | 安徽智磁新材料科技有限公司 | Organic-inorganic mixed coating iron-based amorphous soft magnetic alloy magnetic powder core |
-
2019
- 2019-10-12 CN CN201910969140.2A patent/CN110625111A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112247142A (en) * | 2020-10-21 | 2021-01-22 | 九江学院 | Double-hard-phase double-bonding-phase metal carbide ceramic powder with core-shell structure and preparation method thereof |
| CN113593797A (en) * | 2021-06-02 | 2021-11-02 | 安徽智磁新材料科技有限公司 | Organic-inorganic mixed coating iron-based amorphous soft magnetic alloy magnetic powder core |
| CN113461354A (en) * | 2021-07-01 | 2021-10-01 | 中南大学 | Si with function of improving microwave absorption performance of asphalt concrete pavement3N4Preparation method and application of/Fe composite powder |
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