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Preparation method for wrapping surfaces of ceramic particles with metal

A technology of ceramic particles and packaging, applied in metal processing equipment, metal material coating technology, transportation and packaging, etc., can solve the problem of insufficient wettability between ceramic and metal, weak bonding performance between metal and ceramic, and low hardness of metal coating. problems, to achieve the effect of improving bonding performance, low wear rate and high micro Vickers hardness

Inactive Publication Date: 2019-12-31
山东东大新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the existing methods of wrapping metal on the surface of ceramic materials have the following defects: (1) The wettability of ceramics and metals is not enough, and the surface energy of the wrapped ceramics is low; (2) The bonding performance of metals and ceramics Weak; (3) The hardness of the metal coating wrapped on the ceramic surface is not high, the coating is easy to be worn and lost, and the overall performance of the coating is low

Method used

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  • Preparation method for wrapping surfaces of ceramic particles with metal
  • Preparation method for wrapping surfaces of ceramic particles with metal
  • Preparation method for wrapping surfaces of ceramic particles with metal

Examples

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Effect test

Embodiment 1

[0077] A preparation method for coating metal on the surface of ceramic particles, the steps are as follows:

[0078] (1) TiB 2 Pour the ceramic powder into the alkaline solution, ultrasonically clean it for 45 minutes, wash it with deionized water until it is neutral, and then put it in a drying oven at 120°C to dry;

[0079] (2) TiB 2 Pour the ceramic powder into the acid solution, ultrasonically clean it for 60 minutes, wash it with deionized water until it is neutral, and then put it in a drying oven to dry at 110°C;

[0080] (3) According to mass ratio, TiB 2 Ceramic powder and Ti powder, NH 4 Cl, TiH 2 =85:15:10:15 After uniform mixing, put it into a horizontal tube furnace, and conduct a vacuum reaction treatment at 850°C for 3 hours;

[0081] (4) Sieve the ceramic powder with a 800-mesh sieve, wash with absolute ethanol and deionized water for 4 times, and then put it in a drying oven for drying at 120°C;

[0082] (5) According to mass ratio, TiB 2 Ceramic powde...

Embodiment 2

[0086] A preparation method for coating metal on the surface of ceramic particles, the steps are as follows:

[0087] (1) Pour the WC ceramic powder into the alkaline solution, ultrasonically clean it for 60 minutes, wash it with deionized water until it is neutral, and then put it in a drying oven to dry at 150°C;

[0088] (2) Pour the WC ceramic powder into the acid solution, ultrasonically clean it for 90 minutes, wash it with deionized water until it is neutral, and then put it in a drying oven to dry at 120°C;

[0089] (3) According to the mass ratio, WC ceramic powder and Ti-Ni mixed powder, NH 4 Cl, TiH 2 -NiH mixed powder=95:20:15:25, mixed evenly and put into a horizontal tube furnace, 950°C vacuum reaction treatment for 2h;

[0090] (4) Sieve the ceramic powder with a 1250-mesh screen, wash with absolute ethanol and deionized water for 7 times, and then put it into a drying oven for drying at 150°C;

[0091] (5) According to the mass ratio, WC ceramic powder and T...

Embodiment 3

[0095] A preparation method for coating metal on the surface of ceramic particles, the steps are as follows:

[0096] (1) According to the mass ratio, Si 3 N 4 with Al 2 o 3 Ceramic powder = 35:65 mixed evenly, and poured into the alkaline solution, after ultrasonic cleaning for 90 minutes, washed with deionized water until neutral, and then dried in a drying oven at 120°C;

[0097] (2) Si 3 N 4 -Al 2 o 3 The ceramic powder is poured into the acid solution, ultrasonically cleaned for 30 minutes, washed with deionized water until neutral, and then dried in a drying oven at 150°C;

[0098] (3) According to the mass ratio, Si 3 N4 -Al 2 o 3 Ceramic powder and Ti-Ni mixed powder, NH 4 Cl, TiH 2 Mixed powder = 90:25:20:15, mix evenly and put it into a horizontal tube furnace, and conduct a vacuum reaction treatment at 1050°C for 5 hours;

[0099] (4) Sieve the ceramic powder with a 1000-mesh sieve, wash with absolute ethanol and deionized water for 5 times, and then pu...

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Abstract

The invention relates to a preparation method for wrapping the surfaces of ceramic particles with metal, and belongs to the field of metal-ceramic composite. The method comprises alkali treatment, acid treatment, wrapping treatment and mixing, wherein in the wrapping treatment, the mass ratio of ceramic powder to metal powder, NH4Cl and metal hydride is (80-95):(12-25):(8-20):(15-25); and during mixing, the mass ratio of the ceramic powder to the metal powder is (40-70):(30-60). According to the preparation method, firstly alkali washing and acid washing are carried out on the ceramic particles, that is, activation treatment is carried out, then the ceramic particles after the alkali washing and acid washing are uniformly mixed with the metal powder, NH4Cl and the metal hydride for vacuumreaction treatment, and the surfaces of the ceramic particles are wrapped with the layer of metal; and therefore, oxidation is avoided, wetting and compatibility with the metal are improved, and the coating retains the characteristics of high hardness, friction and wear resistance and chemical corrosion resistance of the ceramic. The preparation method has the advantages of simple process, low equipment requirement and convenient batch production.

Description

technical field [0001] The invention belongs to the field of preparation of metal-ceramic composite powders, in particular to a method for preparing ceramic particle surfaces coated with metal. Background technique [0002] Ceramic materials have the characteristics of high hardness, high strength, friction and wear resistance, chemical corrosion resistance and high temperature oxidation resistance, and play a pivotal role in the field of coatings. Ceramic powder and metal powder are evenly mixed, and are coated by supersonic flame spraying and atmospheric plasma spraying. , laser cladding and other equipment to form a coating on the surface of metal parts with mixed powder, which not only increases the wear resistance and corrosion resistance of metal parts, but also improves the mechanical properties and high temperature oxidation resistance. It is used in mining, metallurgy, machinery, Transportation, aerospace, military and other fields have very high practical value. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/22C23C4/06C23C4/129C23C4/134C23C24/10
CPCB22F9/22C23C4/129C23C4/06C23C24/103C23C4/134B22F1/17
Inventor 茹红强孙卫康李庆春汤志强王春华
Owner 山东东大新材料研究院有限公司
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