Low-heat-expansion high-intensity alumina-silicon-aluminum (AlN-Si-Al) mixed composite material and preparation method thereof

A composite material and low thermal expansion technology, which is applied in AlN-Si-Al hybrid composite material and its preparation, hybrid composite material and its preparation field, can solve the problems of difficulty, non-wetting of metal aluminum, poor powder sintering performance, etc. Achieve the effects of promoting rearrangement, strong designability, and high-strength machining process performance
CN103160716BActive Publication Date: 2015-04-15有研金属复材技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
有研金属复材技术有限公司
Publication Date
2015-04-15

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Abstract

The invention relates to a low-heat-expansion high-intensity alumina-silicon-aluminum (AlN-Si-Al) mixed composite material and a preparation method thereof. The AlN-Si-Al mixed composite material comprises 10wt% to 25wt% of AlN, 40 wt% to 45 wt% of Si and 30 wt% to 50 wt% of Al, wherein the AlN and the Si are used as reinforcing materials and distributed in a continuous aluminum substrate in the form of particles in a dispersive mode, so that a reinforced aluminium base composite material mixed with AlN particles and Si particles is formed. The AlN-Si-Al mixed composite material is prepared by adoption of a powder metallurgy preparation process. The low-heat-expansion high-intensity AlN-Si-Al mixed composite material has low heat expansion and high intensity. The composite material is uniform in microstructure, completely compact and of a good machining process performance. The AlN-Si-Al mixed composite material is expected to be a substitute material of a high-silicon-content Si / Al packaging material and a substitute material of high-silicon-carbide (SiC)-content SiC / Al packaging material.
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Description

technical field

[0001] The invention relates to a hybrid composite material containing aluminum, silicon and aluminum nitride and its preparation method, in particular to an AlN-Si-Al hybrid composite material with low thermal expansion and high strength and its preparation method, belonging to the metal matrix composite field of materials technology. Background technique

[0002] Aluminum matrix composites have comprehensive performance advantages such as high specific strength, high specific stiffness, high thermal conductivity, and adjustable thermal expansion coefficient, so they have gained important applications in the fields of aerospace, microelectronics, and transportation. Most of the aluminum matrix composites use silicon carbide, aluminum oxide, silicon, aluminum nitride, boron carbide and other particles or whiskers, as well as fibers, etc. as reinforcement materials. Among them, silicon is an ideal reinforcement material with light weight, low thermal expansio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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