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A kind of preparation method of copper aluminum nitride composite material

A composite material, copper-aluminum nitride technology, is applied in the field of preparation of copper-aluminum nitride composite materials to achieve the effects of good interface bonding, less initial investment and fine particles

Inactive Publication Date: 2016-03-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of copper aluminum nitride is obtained by using the basic principle of acid copper plating. The advantage of this method is that the preparation of copper aluminum nitride can improve the hardness, wear resistance and corrosion resistance of the substrate while not reducing the thermal conductivity; The disadvantage is that waste liquid is generated during the preparation process, which is poor in environmental protection, and additional environmental protection equipment needs to be invested
[0009] The above-mentioned several known copper aluminum nitride preparation methods have their advantages and disadvantages, but for copper aluminum nitride composite materials, the biggest disadvantage lies in the matrix The interface state between copper and aluminum nitride reinforcement is not good, which is basically a physical bonding interface; moreover, the preparation process of powder metallurgy and composite electroplating is easy to cause secondary pollution on the surface of the matrix and the surface of the particles, which increases the Interfacial Bonding Strength of Copper Aluminum Nitride Composites

Method used

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  • A kind of preparation method of copper aluminum nitride composite material
  • A kind of preparation method of copper aluminum nitride composite material

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Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of the copper aluminum nitride composite material described in this embodiment, such as figure 1 As shown, it specifically includes the following steps:

[0032] Weigh electrolytic copper and electrolytic aluminum according to the ratio of mass ratio of 10:1. Among them, the electrolytic copper is put into the graphite crucible of the autoclave, the electrolytic aluminum is placed in the feed tank, and the autoclave cover is covered. Vacuumize the kettle, when the vacuum degree reaches 5×10 -3 At Pa, conduct induction heating to the electrolytic copper; when the temperature reaches 1060°C, keep it warm for 3 minutes, then add electrolytic aluminum, and carry out electromagnetic stirring for 2 minutes; open the nitrogen valve, feed nitrogen with a purity of 99.9% into the reaction kettle, and bring A nitrogen conduit with a graphite crucible cover is inserted into the copper-aluminum alloy solution so that the graphite crucible cover can cover th...

Embodiment 2

[0035] The preparation method of the copper aluminum nitride composite material described in this embodiment, such as figure 1 As shown, it specifically includes the following steps:

[0036] Weigh the electrolytic copper and electrolytic aluminum according to the ratio of 15:2 in mass ratio, wherein the electrolytic copper is put into the graphite crucible of the autoclave, and the electrolytic aluminum is put into the feed tank, and the autoclave cover is covered, and the high-pressure reaction Vacuumize the kettle, when the vacuum degree reaches 5×10 -3 Pa, conduct induction heating to the electrolytic copper; when the temperature reaches 1070°C, keep it warm for 1 min, then add electrolytic aluminum, and carry out electromagnetic stirring for 1 min; open the nitrogen valve, feed 99.9% nitrogen into the reaction kettle, and The nitrogen conduit of the crucible cover is inserted into the copper-aluminum alloy solution, and the graphite crucible cover can cover the graphite...

Embodiment 3

[0038] The preparation method of the copper aluminum nitride composite material described in this embodiment, such as figure 1 As shown, it specifically includes the following steps:

[0039] Weigh the electrolytic copper and electrolytic aluminum according to the mass ratio of 20:1, wherein the electrolytic copper is placed in the graphite crucible of the autoclave, the electrolytic aluminum is placed in the feed tank, and the autoclave cover is covered, and the high-pressure reaction Vacuumize the kettle, when the vacuum degree reaches 3×10 -4 Pa, conduct induction heating to the electrolytic copper; when the temperature reaches 1080°C, keep it warm for 2 minutes, then add electrolytic aluminum, and carry out electromagnetic stirring for 0.5 minutes; open the nitrogen valve, feed 99.99% nitrogen into the reaction kettle, and The nitrogen conduit of the graphite crucible cover is inserted into the copper-aluminum alloy solution, and the graphite crucible cover can cover the...

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Abstract

The invention discloses a method for preparing a copper-aluminum nitride composite material, which belongs to the technical field of high-strength and high-conductivity copper-based composite materials. The feature of this technology is that aluminum nitride particles are formed in situ during the smelting process, the interface between the reinforcement phase aluminum nitride particles and the substrate copper is clean and firmly bonded, and due to the protective effect of supersaturated nitrogen during the formation of aluminum nitride, reducing The oxygen absorption of the copper matrix can prepare copper aluminum nitride composite materials with low oxygen content and fine aluminum nitride particles. The advantage of this process is that the fine particles formed during the smelting process of aluminum nitride particles have good interface bonding and can be evenly distributed in the copper matrix, which greatly improves the comprehensive performance of the copper aluminum nitride composite material.

Description

Technical field: [0001] The invention relates to a method for preparing a copper-aluminum nitride composite material, belonging to the technical field of high-strength and high-conductivity copper-based composite materials. Background technique: [0002] High-strength and high-conductivity copper-based materials are mainly used in high-speed rail transit wires, continuous casting machine crystallizers for metallurgical industry, electronic countermeasures, radar, and high-pulse magnetic field conductors for national defense and military industries. Whether their performance is excellent or not directly affects my country's National defense security and people's living standards. [0003] Particle-reinforced copper-based composite materials are a large category of high-conductivity and high-strength copper-based materials. Among them, aluminum nitride-reinforced copper-based composite materials have low density, high thermal conductivity, and low thermal expansion coefficien...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C1/10C22C9/01C22C32/00
Inventor 周晓龙曹建春
Owner KUNMING UNIV OF SCI & TECH