Method for improving strength and conductivity matching of copper-based composite material based on in-situ reaction

A copper-based composite material, in-situ reaction technology, applied in conductive materials, conductive materials, metal/alloy conductors, etc., can solve the problem of the difficulty of matching the conductivity and strong plasticity of copper-based composite materials, low interface bonding strength, and poor dispersion problems, to achieve the effect of improving the interface bonding ability, improving the interface wettability, and improving the interface bonding strength

Inactive Publication Date: 2021-08-31
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the chromium-containing copper-based alloy system is used as the matrix, and the graphene oxide is used as the reinforcing phase. Through grinding and plasma sintering, the carbon atoms in the graphene oxide react in-situ with the trace element chromium in the chromium-containing copper-based alloy to form The corresponding chromium carbides form a coherent or semi-coherent interface with the chromium-containing copper-based alloy matrix. While improving the interface strength between graphene oxide and chromium-containing copper-based alloys, the combination of graphene oxide in the alloy matrix The highly dispersed distribution makes the prepared copper-based composite material maintain good electrical conductivity, and solves the problem of poor wettability between graphene and copper matrix in the prior art, low interfacial bonding strength, and poor dispersion. Difficult to Match the Electrical Conductivity and Strong Plasticity of Matrix Composites

Method used

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  • Method for improving strength and conductivity matching of copper-based composite material based on in-situ reaction
  • Method for improving strength and conductivity matching of copper-based composite material based on in-situ reaction

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Experimental program
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Effect test

Embodiment 1

[0024] The preparation process of the copper matrix composite material of the present embodiment comprises the following steps:

[0025] Step 1. Weigh 0.3g of graphene oxide powder and 99.7g of CuCrZr alloy powder, wherein the graphene oxide powder is a nano-powder prepared by Hummers method, and the CuCrZr alloy powder is a 20 μm powder prepared by gas atomization method. The raw material powder is ground on the QM-3SP2 planetary ball mill, and the grinding speed is set to 300r / min. The grinding medium used in the grinding process is stainless steel grinding balls. Among them, 300g of stainless steel grinding balls with a diameter of 8mm and stainless steel grinding balls with a diameter of 5mm 100 g of grinding balls, 100 g of stainless steel grinding balls with a diameter of 2 mm, after grinding for 8 hours, a mixed powder is obtained;

[0026] Step 2. Plasma sintering the mixed powder obtained in step 1. The sintering temperature of plasma sintering is 900° C., the holding...

Embodiment 2

[0035] The preparation process of the copper matrix composite material of the present embodiment comprises the following steps:

[0036] Step 1. Weigh 0.1g of graphene oxide powder and 99.9g of CuCr alloy powder, wherein the graphene oxide powder is a nano-powder prepared by Hummers method, and the CuCr alloy powder is a 10 μm powder prepared by gas atomization method. The raw material powder is ground on the QM-3SP2 planetary ball mill, and the grinding speed is set to 350r / min. The grinding medium used in the grinding process is stainless steel grinding balls. Among them, 300g of stainless steel grinding balls with a diameter of 8mm and stainless steel grinding balls with a diameter of 5mm 100g of grinding balls, 100g of stainless steel grinding balls with a diameter of 2mm, to obtain mixed powder;

[0037] Step 2. Plasma sintering the mixed powder obtained in step 1. The sintering temperature of plasma sintering is 1000° C., the holding time is 20 minutes, the pressure is 1...

Embodiment 3

[0039] The preparation process of the copper matrix composite material of the present embodiment comprises the following steps:

[0040] Step 1. Weigh 10.0g of graphene oxide powder and 990.0g of CuCrZr alloy powder, wherein the graphene oxide powder is a nano-powder prepared by the Hummers method, and the CuCrZr alloy powder is a 60 μm powder prepared by a gas atomization method. The raw material powder is ground on the QM-3SP2 planetary ball mill, and the grinding speed is set to 250r / min. The grinding medium used in the grinding process is stainless steel grinding balls. Among them, 300g of stainless steel grinding balls with a diameter of 8mm, and stainless steel grinding balls with a diameter of 5mm 100 g of grinding balls, 100 g of stainless steel grinding balls with a diameter of 2 mm, after grinding for 5 hours, a mixed powder is obtained;

[0041] Step 2: Perform plasma sintering on the mixed powder obtained in step 1. The sintering temperature of plasma sintering is ...

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Abstract

The invention discloses a method for improving strength and conductivity matching of a copper-based composite material based on an in-situ reaction. The method comprises the steps that firstly, graphene oxide powder and chromium-containing copper-based alloy powder are taken as raw material powder, and the raw material powder is uniformly mixed in a grinding manner to obtain mixed powder; and secondly, the mixed powder obtained in the first step is subjected to plasma sintering, so that the mixed powder generates the in-situ reaction, and the copper-based composite material with strength and conductivity matched is obtained through cooling. Graphene oxide is used as a reinforcing phase, a chromium-containing copper-based alloy system is used as a matrix, through grinding and plasma sintering, carbon atoms in the graphene oxide and chromium in the chromium-containing copper-based alloy are subjected to the in-situ reaction to form chromium carbide, the chromium carbide and the alloy matrix form a coherent or semi-coherent interface, the interface strength between the graphene oxide and the chromium-containing copper-based alloy is improved, and meanwhile the prepared copper-based composite material keeps good conductivity in combination with high dispersion of the graphene oxide in the alloy matrix.

Description

technical field [0001] The invention belongs to the technical field of preparation of copper-based composite materials, and in particular relates to a method for improving the strength and conductivity matching of copper-based composite materials based on in-situ reactions. Background technique [0002] Among the simple metals and their alloys, the electrical conductivity of copper is second only to metallic silver, and the cost is relatively low. As a typical research representative of high-strength and high-conductivity materials, it is used as integrated circuit lead frames, high-speed rail contact wires, resistance spot welding electrodes and electromagnetic guns. Core components such as guide rails are widely used in electronic and electrical, electronic packaging, and other industrial information departments. With the advent of the 5G era, the requirements for conductive copper materials are getting higher and higher, and there is even an urgent need for ultra-high con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05B22F1/00B22F9/04B22F3/105C22C32/00H01B1/02
CPCB22F1/0003B22F3/105B22F9/04B22F2009/043C22C1/058C22C32/00H01B1/026
Inventor 董龙龙张伟霍望图李亮贺加贝李响常国宋梦珊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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