A kind of preparation method of high-volume fraction sip/al composite material high temperature resistant gold coating

A composite material and high-temperature-resistant technology, which is applied in the coating process of metal materials, plating of superimposed layers, coating, etc., can solve the problems of reduced contact area between the coating and the substrate, poor bonding of the coating, and peeling, etc., to achieve Uniform appearance, low porosity, fine crystallization effect

Active Publication Date: 2019-01-25
BEIJING SATELLITE MFG FACTORY
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Problems solved by technology

[0005] The silicon particle component in the high-volume Sip / Al composite material is non-conductive, and its content is generally about 60%. During the deposition process of the coating, it cannot directly crystallize and nucleate on the surface, resulting in a reduction in the contact area between the coating and the substrate. The bonding force of the coating is poor, and problems such as peeling and foaming are prone to occur in high-temperature baking conditions

Method used

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  • A kind of preparation method of high-volume fraction sip/al composite material high temperature resistant gold coating
  • A kind of preparation method of high-volume fraction sip/al composite material high temperature resistant gold coating
  • A kind of preparation method of high-volume fraction sip/al composite material high temperature resistant gold coating

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preparation example Construction

[0041] The method for preparing a high temperature-resistant gold coating on the surface of a high-volume Sip / Al composite material of the present invention is to coat the surface of an aluminum-based composite material with a silicon particle component of 50% to 60% by volume, and the specific steps are as follows: :

[0042] (1) Wipe the surface of the high-volume Sip / Al composite material, so that the surface of the high-volume Sip / Al composite material is completely wetted by water and the water film is continuous within 30s; the silicon particle group in the high-volume fraction Sip / Al composite material The volume percentage of the centrifuge is 50% to 60%;

[0043] (2) the surface of the high volume fraction Sip / Al composite material obtained in step (1) is sandblasted, and the sandblasting operating conditions are as follows:

[0044]

[0045] After sandblasting, use oil-free compressed air to dry the surface of the high-volume Sip / Al composite material;

[0046] ...

Embodiment 1

[0094] A preparation method for high temperature resistant gold coating of Sip / Al composite material with high volume fraction, the method comprises the following steps:

[0095] 1) Wipe the surface of the high-volume Sip / Al composite material, so that the surface of the high-volume Sip / Al composite material is completely wetted by water and the water film is continuous within 30s; the silicon particle component in the high-volume fraction Sip / Al composite material The volume percentage of 60%;

[0096] 2) sandblasting the surface of the high-volume Sip / Al composite material obtained in step 1), and the sandblasting operating conditions are as follows:

[0097]

[0098] After sandblasting, use oil-free compressed air to dry the surface of the high-volume Sip / Al composite material;

[0099] 3) chemically degreasing the surface of the high-body fraction Sip / Al composite material obtained in step 2), and the chemical degreasing solution formula and operating conditions are as...

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Abstract

The invention relates to a method for preparing a high-temperature-resisting gold coating of a high-volume-fraction Sip / Al composite material. The gold coating prepared in the method is uniform in surface color, and can bear baking with the high temperature of 400 DEG C or more through binding force. According to the method, the bonding strength of a bottom coating and a base material is improved through the reinforced cooperating effect of sand-blasting coarsing and Ni-P alloy bottom coating heat treatment; meanwhile, surface activating conducted on the Ni-P alloy bottom coating which is subjected to heat treatment is realized thoroughly by combining acid pickling and secondary chemical nickel plating; the bonding strength of the gold coating and the bottom coating is guaranteed. The method can be applied to preparation of loaded high-volume-fraction Sip / Al composite material heat-sink bottom plates and shell surface high-temperature-resisting gold coatings for high-power microwave products, phase array antennas and aerospace power supplies in the fields of aerospace and aviation, and has wide application fields.

Description

technical field [0001] The invention relates to a preparation method for a high-volume fraction Sip / Al composite material high temperature resistant gold coating, in particular to a high-volume fraction Sip / Al applied to high-power microwave products, phased array antennas, aerospace power supplies and other loads in the fields of aerospace and aviation. The invention discloses a method for preparing a high temperature resistant gold coating on the surface of a composite material heat sink bottom plate and a shell, belonging to the technical field of composite materials, and can be directly applied to the preparation of the surface gold coating on a metal matrix composite material. Background technique [0002] Sip / Al composite material with high volume fraction has the advantages of low density, high thermal conductivity and adjustable thermal expansion coefficient. The power source heat sink carrier and housing have wide application prospects. [0003] Phased array antenn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/36C25D3/48C23C28/02
Inventor 刘云彦崔庆新杨铁山白晶莹徐俊杰佟晓波王磊董俊伟王旭光
Owner BEIJING SATELLITE MFG FACTORY
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