Preparation method for forming metal coating on surface of ceramic substrate by spraying metal powder

A ceramic substrate, metal powder technology, applied in metal material coating process, coating, pressure inorganic powder coating and other directions, can solve problems such as rebound and erosion of metal layer, achieve excellent flatness, excellent shielding performance, The effect of sedimentary structure stabilization

Active Publication Date: 2021-12-24
SHENZHEN XINTIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned deficiencies in the prior art, aiming at the problem that rebound and erosion phenomena more or less exist in the traditional cold spraying process and affect the formation of the metal layer, it is proposed to spray metal powder to form a metal coating on the surface of the ceramic substrate preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The method of preparing the metal powder sprayed metal coating is formed on the surface of the ceramic substrate, comprising the steps of:

[0031] Preparing a metal powder, aerosolization prepared by metal powder, metal powder comprises stainless steel, mixing at least two of copper, aluminum, zinc, and silver, the metal powder is a good screening fully stirred to obtain a mixed metal powder are uniformly mixed, when the mixing required for heating metal powder contains degaussing stainless steel powder, stainless steel powder having a melting point of 780 ~ 1150 ℃.

[0032] Treated surface of the ceramic substrate, the surface of the ceramic substrate was roughened surface forming rough polishing, and ultrasonic cleaning;

[0033] Temperature setting ceramic substrate, the ceramic substrate is disposed in a high temperature space, the high-temperature space temperature is maintained 1200 ℃ ~ 2500 ℃;

[0034] Mixing a metal powder spraying operation, supersonic spraying me...

Embodiment 1

[0043] Cu powder volume accounted for 25% of the volume of silver powder accounted for 25% of the powder volume accounted for 15% of stainless steel, aluminum powder accounted for 25% by volume, the zinc powder volume accounted for 10%. The mixed metal powder as a cold spray powder. Wherein the stainless steel powder melting at 780 ℃.

[0044] Cold spraying using nitrogen as the working gas, the spray particle velocity is set to 2 times the speed of sound, spray gas temperature 160 ℃, high-temperature space temperature of the ceramic substrate 1500 ℃.

[0045] Some ceramic substrate for a single layer coating, a plurality of single-layer metal layers formed sample of 0.01mm ~ 0.3mm, the detection of single metal layer, the metal layer is a single layer when the thickness exceeds 0.02mm, which complete coating without hollow porosity, nor the presence of the through channel, while single-layer metal layer is thicker than 0.2mm, flat coating surface thereof, the difference between t...

Embodiment 2

[0047] Copper powder accounted for 35% by volume, the volume of silver powder accounted for 20% of the powder volume accounted for 15% of stainless steel, aluminum powder accounted for 25% by volume, the zinc powder volume accounted for 5%. The mixed metal powder as a cold spray powder. Wherein the stainless steel powder melting at 780 ℃.

[0048] Cold spraying using nitrogen as the working gas, the spray particle velocity is set to 2 times the speed of sound, spray gas temperature 220 deg.] C, the high-temperature space temperature of the ceramic substrate 1900 ℃.

[0049] Some ceramic substrate for a single layer coating, a plurality of single-layer metal layers formed sample of 0.01mm ~ 0.3mm, the detection of single metal layer, the metal layer is a single layer when the thickness exceeds 0.02mm, which complete coating without hollow porosity, nor the presence of the through channel, while single-layer metal layer is thicker than 0.2mm, flat coating surface thereof, the differ...

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Abstract

The invention discloses a preparation method for spraying metal powder to form a metal coating on the surface of a ceramic substrate. The metal powder is prepared by a gas atomization method, and the screened metal powder is mixed to obtain a mixed metal powder; the surface of the ceramic substrate is roughened and polished. Form a roughened surface and perform ultrasonic cleaning; set the ceramic substrate in a high-temperature space of 1200°C to 2500°C, and perform supersonic spraying of mixed metal powder on the roughened surface of the ceramic substrate to deposit and form a dense metal coating. Layer spraying forms the metal layer of a multilayer superimposed structure. The invention adopts the method of cold spraying and high-temperature space to meet the requirements of forming a shielding metal coating on the ceramic substrate. The coating has no through pores, the deposition structure is stable and the flatness is better, and it has very excellent shielding performance, resistance Corrosion performance, strong characteristics. It can achieve multi-layer deposition, adhesion and superposition, which changes the disadvantage that silver and other metals cannot be attached too thickly, meets the specific shielding performance requirements, and the multi-layer superposition is reliable and stable in structure.

Description

Technical field [0001] The present invention relates to a method of metal coating a metal powder coating on the surface of the ceramic substrate is formed, it belongs to the technical field of metal coating spray forming process. Background technique [0002] Ceramic materials with high hardness, high strength, high toughness, corrosion resistance, wear resistance and low density, low weight, are widely used in industry and military fields, the ceramic substrate and the surface of the metal layer needs to be formed, the conventional ceramic matrix the metal material layer is formed using the bonding method, press method, a film prepared by method, its poor adhesion, scratching and easy to fall off. Chemical method a metal layer structure loose, uneven particle distribution, and the preparation process polluting, requires high temperature baking, and the metal paste mixture slurry will be odor and pollution gas evolution. [0003] Whereas in the prior art technology cold spray, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/04C22C30/02C22C30/06H01P11/00
CPCC23C24/045C22C30/02C22C30/06C22C9/01H01P11/007
Inventor 石伟平王忠伟王一超
Owner SHENZHEN XINTIAN TECH
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