Aluminum-based diamond composite material with high smoothness and preparation method thereof

A technology with high smoothness and composite materials, which is applied in the field of diamond-containing alloys, can solve the problems of poor surface finish, difficult control of composite materials, and difficulty in ensuring the strength of composite materials. It achieves low thermal expansion, uniform distribution of diamonds, and adjustable thickness. tune effect

Active Publication Date: 2022-02-25
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after increasing the volume fraction of diamond to a certain extent (capable of controlling the thermal expansion coefficient of aluminum-based diamond composite materials), both methods have some shortcomings. The existing pressure infiltration process is difficult to regulate the internal structure of the composite material. However, the surface finish of the diamond metal matrix composite material prepared by the powder metallurgy process is poor, and the strength of the composite material is difficult to be well guaranteed.

Method used

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  • Aluminum-based diamond composite material with high smoothness and preparation method thereof
  • Aluminum-based diamond composite material with high smoothness and preparation method thereof
  • Aluminum-based diamond composite material with high smoothness and preparation method thereof

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Embodiment 1

[0040] An aluminum-based diamond composite material with high smoothness, the specific preparation method is as follows:

[0041] 1) Mix aluminum powder (average particle size 85 μm) and kerosene at a mass ratio of 100:5, and use a coating machine to make aluminum powder flakes with a thickness of 0.2 mm; use the diamond distribution machine of YOFC Co., Ltd. (patent No.: CN213439170U) SiC-Si coated diamond particles (particle size 300 μm, coating thickness 0.3 μm) are evenly arranged in an array on the surface of the aluminum powder sheet at 200 μm equal intervals, to obtain an aluminum-diamond composite sheet with diamond particles arranged on the surface A;

[0042] 2) Metal AlSi 12 Pre-alloyed powder (average particle size 68μm) and kerosene are mixed evenly at a mass ratio of 100:3, and made into 0.2

[0043] ㎜ thick aluminum-silicon alloy powder flake B;

[0044] 3) 5 layers of the above-mentioned aluminum-silicon alloy powder flakes B are superimposed as the upper an...

Embodiment 2

[0060] A kind of aluminum base diamond composite material with high smoothness, its preparation method is as follows:

[0061] 1) Mix aluminum powder (average particle size 50 μm) and kerosene evenly at a mass ratio of 100:5, and use a coating machine to make a 0.1 mm thick aluminum powder sheet; -Ti-coated diamond particles (particle size 150 μm, coating thickness 0.2 μm) are uniformly arranged in an array on the surface of the aluminum powder sheet at equal intervals of 150 μm, and an aluminum-diamond composite sheet A with diamond particles arranged on the surface is obtained;

[0062] 2) Metal AlSi 10 Mg pre-alloyed powder (average particle size 56μm) and kerosene mass ratio 100:3 are evenly mixed, and a 0.1mm thick aluminum-silicon alloy powder flake B is made into the upper and lower surface layers by a coating machine;

[0063] 3) The above-mentioned 5-layer aluminum-silicon alloy powder sheet B is superimposed as the upper and lower surface layers, and the 6-layer alu...

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Abstract

The invention relates to an aluminum-based diamond composite material with high smoothness and a preparation method thereof. The preparation method specifically comprises the following steps that: 1) aluminum powder and kerosene are uniformly mixed to prepare an aluminum powder sheet, and coating diamond particles are uniformly arranged on the surface of the aluminum powder sheet according to an array to obtain aluminum-diamond composite sheets A; 2) aluminum-silicon pre-alloy powder is mixed with kerosene to prepare aluminum-silicon alloy powder sheets B; (3) the aluminum-silicon alloy powder sheets B are stacked in a multi-layer mode to serve as upper and lower surface layers, the aluminum-diamond composite sheets A are stacked in a multi-layer mode to serve as middle layers, and an aluminum-based diamond blank is formed through pressing; and (4) the aluminum-based diamond blank is pre-sintered, cooled, taken out, subjected to high-temperature pressure sintering and then polished, and the aluminum-based diamond composite material with high high smoothness is obtained. The aluminum-based diamond composite material provided by the invention has the advantages of high strength, high thermal conductivity, low thermal expansion and high surface smoothness, and can be used for preparing high-precision parts with higher smoothness requirements.

Description

technical field [0001] The invention belongs to the technical field of diamond-containing alloys, and in particular relates to an aluminum-based diamond composite material with high smoothness and a preparation method thereof. Background technique [0002] At present, aluminum-based diamond high thermal conductivity composite materials are widely used in the field of high-end electronic packaging substrate materials. The packaging substrate material needs to be matched with nickel-plated gold and other processes in order to be well combined with the silver paste in the later metal bonding process. In this process, if the surface of the prepared metal matrix composite is relatively rough, it will seriously affect the use of aluminum-based diamond composites in the field of electronic packaging. In order to meet the conditions of use, aluminum-based diamond composites are usually prepared by pressure infiltration technology and powder metallurgy technology. However, after in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C21/02C22C26/00C22C1/10B22F3/02B22F3/10
CPCC22C1/05C22C21/02C22C26/00B22F3/02B22F3/1007B22F3/1017
Inventor 常智敏白华夏兆辉顾立新王瑞春潘旸
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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