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Preparation method for gold plating on surface of silicon carbide particle reinforced aluminum-based composite material

A technology of silicon carbide particles and reinforced aluminum base, which is applied in the direction of surface reaction electrolytic coating, metal material coating process, liquid chemical plating, etc., can solve the problem of affecting the test and evaluation results of the sealing of the tube shell, the porosity of the gold plating layer is large, The problem of large helium adsorption capacity can achieve the effect of achieving the density of the coating, improving the density of the coating, and reducing the internal stress of the coating

Active Publication Date: 2019-02-22
BEIJING SATELLITE MFG FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the loose internal structure and high porosity of the high-volume SiCp / Al composite material, the gold coating prepared by the existing gold coating preparation process has a large porosity. The adsorption amount is large, which affects the evaluation results of the shell sealing test

Method used

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  • Preparation method for gold plating on surface of silicon carbide particle reinforced aluminum-based composite material
  • Preparation method for gold plating on surface of silicon carbide particle reinforced aluminum-based composite material
  • Preparation method for gold plating on surface of silicon carbide particle reinforced aluminum-based composite material

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preparation example Construction

[0053] The embodiment of the present invention provides a method for preparing a gold coating on the surface of a silicon carbide particle reinforced aluminum matrix composite material, comprising the following steps:

[0054] Step (1), carrying out pretreatment to SiCp / Al composite material;

[0055] Specifically, the SiCp / Al composite material described in the embodiments of the present invention can be either a low-volume SiCp / Al composite material with a relatively low volume percentage (<40%) of silicon carbide particle components, or a silicon carbide High-volume SiCp / Al composite material with a relatively high volume percentage of particle components (40% to 70%);

[0056] The pretreatment may include various pretreatment processes before gold plating of such materials, preferably organic degreasing, chemical degreasing, light extraction and chemical roughening are performed on the SiCp / Al composite material, wherein:

[0057] The preferred process for organic degreas...

Embodiment 1

[0080] 1) Wipe the surface of the high volume fraction (60%) SiCp / Al composite material so that the surface of the high volume fraction SiCp / Al composite material is completely wetted by water and the water film is continuous within 30s;

[0081] 2) The surface of the high volume SiCp / Al composite material obtained in step 1) is chemically degreased, and the formula and operating conditions of the chemical degreasing solution are as follows:

[0082]

[0083] After the chemical degreasing is completed, the high volume SiCp / Al composite material is taken out of the solution;

[0084] 3) washing the residual solution on the surface of the high volume SiCp / Al composite material obtained in step 2) with water;

[0085] 4) Light-emitting the surface of the high-volume SiCp / Al composite material obtained in step 3), the formula and operating conditions of the light-emitting solution are as follows:

[0086] Nitric acid 400g / L

[0087] Solution temperature room temperature

[0...

Embodiment 2

[0136] 1) Wipe the surface of the high volume fraction (60%) SiCp / Al composite material so that the surface of the high volume fraction SiCp / Al composite material is completely wetted by water and the water film is continuous within 30s;

[0137] 2) The surface of the high volume SiCp / Al composite material obtained in step 1) is chemically degreased, and the formula and operating conditions of the chemical degreasing solution are as follows:

[0138]

[0139] After the chemical degreasing is completed, the high volume SiCp / Al composite material is taken out of the solution;

[0140] 3) washing the residual solution on the surface of the high volume SiCp / Al composite material obtained in step 2) with water;

[0141] 4) Light-emitting the surface of the high-volume SiCp / Al composite material obtained in step 3), the formula and operating conditions of the light-emitting solution are as follows:

[0142] Nitric acid 500g / L

[0143] Solution temperature room temperature

[0...

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Abstract

The invention relates to a preparation method for a gold plating on the surface of a silicon carbide particle reinforced aluminum-based composite material, and belongs to the technical field of surface engineering. The preparation method comprises the following steps that pretreatment is performed on the silicon carbide particle reinforced aluminum-based composite material; micro-arc oxidation isperformed on the pretreated silicon carbide particle reinforced aluminum-based composite material; surface sensitization, activation and reduction treatment is performed on the material subjected to the micro-arc oxidation; chemical nickel plating is performed on the surface of the material to obtain the material with a nickel layer; and gold plating is performed on the surface of the nickel layerto obtain the gold plating located on the surface of the silicon carbide particle reinforced aluminum-based composite material. According to the preparation method, a ceramic membrane layer is formed, so that the homogenization of chemical properties of an interface of the high-volume-fraction SiCp / Al composite material is realized, it is guaranteed that the subsequent plating is uniform in crystallization, then the porosity of the subsequent plating is reduced, and the compactness of the plating is improved.

Description

technical field [0001] The invention relates to a method for preparing a gold coating on the surface of an aluminum-based composite material reinforced by silicon carbide particles, and belongs to the technical field of surface engineering. Background technique [0002] The high-volume silicon carbide particle-reinforced aluminum matrix composite material (SiCp / Al composite material) with a silicon carbide particle component volume percentage of 50% to 65% has high thermal conductivity, specific strength, specific stiffness, and elastic modulus. Excellent properties such as weight, wear resistance and low thermal expansion coefficient are widely used in the shell and tube structure of T / R components in the aerospace field. [0003] In order to meet the welding requirements of power devices and chips inside the T / R component of the spacecraft antenna, it is necessary to prepare a coating with good wettability on the surface of the high-volume SiCp / Al composite material; at th...

Claims

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Application Information

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IPC IPC(8): C25D3/48C25D5/44C25D11/04C23C18/36
CPCC23C18/36C25D3/48C25D5/44C25D11/026C25D11/04
Inventor 刘云彦李家峰程德靳宇蔺鹏婷白晶莹李思振陈学成曹克宁王旭光徐俊杰姚雪征
Owner BEIJING SATELLITE MFG FACTORY
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