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Preparation method of composite metal layer on ceramic substrate surface

A technology of ceramic substrate and surface compounding, which is applied in metal processing equipment, metal material coating process, superimposed layer plating, etc. It can solve the problems of rebound and erosion of metal layers, and achieve excellent flatness and signal-to-noise ratio. High, stable deposition structure

Active Publication Date: 2022-05-20
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 problems that rebound and erosion phenomena more or less exist in the traditional cold spraying process and affect the formation of the metal layer, a method for preparing a composite metal layer on the surface of a ceramic substrate is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A method for preparing a composite metal layer on the surface of a ceramic substrate, comprising the steps of:

[0032] Preparation of metal powder, metal powder is prepared by gas atomization method, metal powder includes at least two kinds of stainless steel, copper, aluminum, zinc, and silver mixed, the screened metal powder is fully stirred and evenly mixed to obtain mixed metal powder, when mixed When the metal powder contains stainless steel powder, heating and demagnetization is required, and the melting point of the stainless steel powder is 780-1150°C.

[0033] Surface treatment of ceramic substrates, roughening and grinding the surface of ceramic substrates to form a rough surface, and ultrasonic cleaning;

[0034] The ambient temperature of the ceramic substrate is set, and the ceramic substrate is set in a high-temperature space, and the temperature of the high-temperature space is maintained at 1200 ° C to 2500 ° C;

[0035] Mixed metal powder spraying ope...

Embodiment 1

[0045] The volume ratio of copper powder is 25%, the volume ratio of silver powder is 25%, the volume ratio of stainless steel powder is 15%, the volume ratio of aluminum powder is 25%, and the volume ratio of zinc powder is 10%. The above mixed metal powder was used as a cold spray powder. Among them, the melting point of the stainless steel powder is 780°C.

[0046] Nitrogen is used as the working gas for cold spraying, the spraying particle speed is set to be twice the speed of sound, the spraying gas temperature is 160°C, and the high temperature space temperature of the ceramic substrate is 1500°C.

[0047] Carry out single-layer spraying of several ceramic substrates to form multiple single-layer metal layer samples of 0.01mm to 0.3mm, and test the single-layer metal layer. When the thickness of the single-layer metal layer exceeds 0.02mm, the coating is complete without hollowing out There are no pores, and there are no through channels, and when the thickness of a sin...

Embodiment 2

[0049] The volume ratio of copper powder is 35%, the volume ratio of silver powder is 20%, the volume ratio of stainless steel powder is 15%, the volume ratio of aluminum powder is 25%, and the volume ratio of zinc powder is 5%. The above mixed metal powder was used as a cold spray powder. Among them, the melting point of the stainless steel powder is 780°C.

[0050] Nitrogen is used as the working gas for cold spraying, the spraying particle speed is set to be twice the speed of sound, the spraying gas temperature is 220°C, and the high temperature space temperature of the ceramic substrate is 1900°C.

[0051] Carry out single-layer spraying of several ceramic substrates to form multiple single-layer metal layer samples of 0.01mm to 0.3mm, and test the single-layer metal layer. When the thickness of the single-layer metal layer exceeds 0.02mm, the coating is complete without hollowing out There are no pores, and there are no through channels, and when the thickness of a sing...

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Abstract

The invention discloses a method for preparing a composite metal layer on the surface of a ceramic base material. 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 base material is roughened and polished to form a rough surface and Ultrasonic cleaning; the ceramic substrate is placed in a high-temperature space of 1200°C to 2500°C, and supersonic spraying of mixed metal powder is carried out on the roughened surface of the ceramic substrate to deposit and form a dense metal coating, and then through the electroplating process on the metal Plating molding is performed on the coating. 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 then the electroplating operation is performed on it. It has very excellent shielding performance, corrosion resistance and firmness. The ceramic filter prepared by the method has high signal-to-noise ratio and good amplitude-frequency and phase-frequency characteristics.

Description

technical field [0001] The invention relates to a method for preparing a composite metal layer on the surface of a ceramic base material, and belongs to the technical field of metal coating spraying forming technology. Background technique [0002] Ceramic materials have the advantages of high hardness, high strength, high toughness, corrosion resistance, wear resistance, low density and low weight, and are widely used in industry, military and other fields, while the surface of ceramic substrates needs to form a metal layer. Traditional ceramic substrates The metal layer on the material is formed by bonding method, pressing method, and film-coating method, and its bonding force is poor, and it is easy to fall off and scratch. The metal layer prepared by the chemical method has a loose structure and uneven particle distribution, and the preparation process is highly polluted, requiring high-temperature baking, and the mixed slurry of silver paste and metal will have peculiar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/08B22F1/052C23C24/04C25D5/24C23C28/02
CPCB22F9/082C23C24/04C25D5/34C23C28/021B22F1/052
Inventor 石伟平王忠伟王一超
Owner SHENZHEN XINTIAN TECH
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