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

An aluminum composite material and diamond technology, applied in the field of composite material preparation, can solve problems such as high specific strength, high specific stiffness, high temperature resistance, corrosion resistance and fatigue resistance, and achieve good air tightness, high thermal conductivity, The effect of adjustable expansion coefficient

Inactive Publication Date: 2018-11-16
XIAN AERONAUTICAL UNIV
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  • Claims
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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

Method used

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

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Embodiment Construction

[0029] The present invention will be further described in detail below.

[0030] Wherein, the preparation method of the diamond / silicon carbide preform is as follows:

[0031] The first step is to prepare the adhesive:

[0032] First add distilled water accounting for 48% to 67% of the total mass of the adhesive, heat and control the temperature at 20 to 35°C, and slowly add polyvinyl alcohol accounting for 30% to 45% of the total mass of the adhesive under stirring. Add 2% to 5% hydroxypropyl methylcellulose of the total mass of the adhesive and 1% to 2% starch accounting for the total mass of the adhesive into the mixer and stir for 5 to 10 minutes, then heat to 80 to 85°C, Continue to keep warm and stir for 1.5-2 hours to dissolve it until the solution no longer contains tiny particles, and then pass through 40-60 mesh stainless steel to filter impurities to prepare an adhesive, which can be used for later use;

[0033] The second step is to prepare the prefab:

[0034] ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/622C04B35/634C04B35/636
CPCC04B35/565C04B35/622C04B35/63416C04B35/636C04B35/6365C04B2235/349C04B2235/402C04B2235/427C04B2235/616C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 唐健江王鹏冲
Owner XIAN AERONAUTICAL UNIV
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