Preparation methods of diamond/silicon carbide prefabricated part and diamond/silicon carbide/aluminium compound material

Abstract

The invention provides preparation methods of a diamond / silicon carbide prefabricated part and a diamond / silicon carbide / aluminium compound material. The methods comprise the following steps that 1, silicon carbide powder and diamond powder are mixed according to a mass ratio of 5:2, and after continuous and even mixing, micro diamond powder is obtained; 2, a binder is added into the micro diamondpowder to obtain mixed powder; 3, a diamond prefabricated part green body obtained in last step is subjected to sintering to prepare the diamond / silicon carbide prefabricated part; 4, in a differential-pressure casting furnace, the diamond / silicon carbide prefabricated part is impregnated with aluminium alloy liquid, so that the diamond / silicon carbide / aluminium compound material is obtained. Thediamond / silicon carbide / aluminium compound material prepared through the method has the characters of being low in density, adjustable in expansion coefficient, high in heat conductivity, high in elasticity modulus, good in gas tightness and low in cost, and can be widely applied to the micro-electronics fields of hybrid integrated circuits, millimeter wave / micron wave integrated circuits, multi-chip modules, high current and power IGBT modules and the like.

Description

technical field [0001] The invention belongs to the field of composite material preparation, in particular to a preparation method of a diamond / silicon carbide preform and a diamond / silicon carbide / aluminum composite material. Background technique [0002] With the rapid development of microelectronics technology, the ever-increasing level of circuit integration puts forward higher requirements for electronic packaging materials. Especially in the development of aerospace, rocket, atomic energy, machinery and chemical industries, the requirements for the performance of engineering materials are getting higher and higher, such as high specific strength, high specific stiffness, high temperature resistance, corrosion resistance, fatigue resistance, etc. This is mostly difficult to achieve for a single metal material, ceramic material or polymer material. Therefore, the emergence and development of metal matrix composites have been promoted. [0003] Compared with traditional...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a diamond / silicon carbide preform and a diamond / silicon carbide / aluminum composite material preparation method, which solves the problem that existing single engineering materials cannot meet the requirements of high specific strength, high specific stiffness, high temperature resistance, and corrosion resistance. and anti-fatigue performance requirements

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