Manufacturing method of high-reliability and high-thermal-conductivity diamond reinforced metal matrix composite material

A diamond reinforced, composite material technology is applied in the field of composite material preparation, which can solve the problems of low thermal conductivity of composite materials, interruption of thermal conduction channels, decrease in thermal conductivity, etc., and achieve the effects of excellent thermal conductivity, improved reliability, and high reliability.

Active Publication Date: 2021-06-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the diamond in the existing diamond-reinforced metal matrix composite material is discontinuous, which leads to the interruption of the thermal conduction channel in the composite material, which in turn leads to a decrease in thermal conductivity, the low thermal conductivity of the composite material, and the formation of carbides between diamond and metal leading to reliability. The problem of falling provides a method for the preparation of diamond-reinforced metal matrix composites with high reliability and high thermal conductivity

Method used

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  • Manufacturing method of high-reliability and high-thermal-conductivity diamond reinforced metal matrix composite material

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specific Embodiment approach 1

[0022] Specific implementation mode 1: The preparation method of the high-reliability and high-thermal conductivity diamond-reinforced metal matrix composite material in this implementation mode is carried out according to the following steps:

[0023] 1. Weighing: Weigh 50% to 95% of diamond powder and 5% to 50% of metal matrix by volume fraction;

[0024] The surface of the diamond powder has a coating;

[0025] The coating material on the surface of the diamond powder is W, Mo, Cr, Ti, etc., and the coating thickness is 10-50nm; W, Mo, Cr, and Ti are easy to react with diamond at high temperature to form carbides, and the generated carbides The material is stable and does not cause significant changes in thermal conductivity after wet heat treatment.

[0026] 2. Preparation of diamond preform:

[0027] Put the diamond powder into a graphite mold and cold press it to obtain a diamond body; transfer the diamond body with a mold to a spark plasma sintering furnace, and condu...

specific Embodiment approach 2

[0034] Embodiment 2: This embodiment differs from Embodiment 1 in that: the average particle size of the diamond powder in Step 1 is 20-300 μm.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the metal substrate in step 1 is pure aluminum, aluminum alloy, pure copper or copper alloy.

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Abstract

The invention discloses a manufacturing method of a high-reliability and high-thermal-conductivity diamond reinforced metal matrix composite material, and relates to a manufacturing method of a composite material. The method aims to solve the problems that an existing diamond reinforced metal matrix composite material is low in thermal conductivity, and the reliability is reduced. The method comprises the steps of carrying out cold pressing on diamond powder with a coating to obtain a diamond blank, carrying out spark plasma sintering under the vacuum or inert atmosphere protection to obtain a diamond preformed body, placing the diamond preformed body and a mold on the platform surface of a press, pouring a molten metal matrix to the top of the diamond preformed body in the mold, and carrying out pressure infiltration. According to the method, the coating on the diamond surface is sintered by spark plasma sintering to form a continuous heat conducting passage, so that the heat conducting property of the material is improved. The coating easily reacts with the diamond to generate carbide metal and is stable, so that the reliability of the manufactured composite material is improved. The method is suitable for manufacturing the diamond reinforced metal matrix composite material.

Description

technical field [0001] The invention relates to a preparation method of a composite material. Background technique [0002] With the rapid development of semiconductor technology, the integration of chips is getting higher and higher, and the heat dissipation is also increasing. At the same time, the performance requirements are extremely high. As we all know, the integration and power density of electronic components are getting higher and higher, and a large amount of heat is generated during the working process of integrated circuits, which will cause the temperature to rise continuously, which will inevitably lead to the decline of chip performance. The advancement of the times is crucial. However, some traditional heat-conducting materials have the problem of low thermal conductivity or high density, which cannot meet the current high heat-conducting and low-quality requirements. Therefore, a new type of heat-conducting material, diamond-reinforced metal matrix compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B22F1/02C22C26/00C01B32/28
CPCC22C1/1036C22C1/1015C22C26/00C01B32/28B22F1/17C22C1/1073
Inventor 孙凯张强杨文澍修子扬陈国钦武高辉芶华松姜龙涛康鹏超乔菁周畅
Owner HARBIN INST OF TECH
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