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A high-strength and high-conductivity graphene-reinforced copper-based composite material and its preparation method and application

A technology of copper-based composite materials and graphene, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of not meeting the requirements of high-strength and high-conductivity copper-based composite materials, and avoid oxidation and graphene structure damage, Excellent performance and the effect of improving drying efficiency

Active Publication Date: 2021-04-02
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrical conductivity of the composite material prepared by it is only 63.84-71.84% IACS, and the tensile strength is 246-250MPa, which cannot meet the requirements of high-strength and high-conductivity copper-based composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare 0.5wt% graphene-reinforced copper-based composite material, graphene and quasi-spherical copper powder are commercially available, and the specific steps are as follows:

[0055] (1) Mix 5g of graphene with 2000ml of absolute ethanol, first carry out shear dispersion treatment in a high-speed shear disperser, wherein the rotating speed is 7000rpm, and the time is 0.5h; then perform ultrasonic oscillation treatment in an ultrasonic cell pulverizer To disperse the graphene, the ultrasonic frequency is 50KHz, and the running time is 5h to obtain a graphene monodisperse liquid; 1kg of copper powder (15-25 μm in particle size, spherical shape) is added to the graphene monodisperse liquid, and then Put the mixture of graphene monodispersion and copper powder into a ball mill jar for mechanical ball milling for 18 hours, the ball-to-material ratio in the ball mill jar is 20:1, the ball mill speed is 100rpm, and the total amount of the mixture does not exceed 2 / 3 of the ...

Embodiment 2

[0065] Prepare 0.1wt% graphene-reinforced copper-based composite material, graphene and quasi-spherical copper powder are commercially available, and the specific steps are as follows:

[0066] (1) Mix 0.1g of graphene with 500ml of absolute ethanol, first carry out shear dispersion treatment in a high-speed shear disperser, wherein the rotation speed is 2000rpm, and the time is 4h; then perform ultrasonic oscillation treatment in an ultrasonic cell pulverizer To disperse the graphene, the ultrasonic frequency is 50KHz, and the operation time is 0.5h to obtain a graphene monodisperse liquid; 0.1kg copper powder (15-20 μm in particle size, spherical shape) is added to the graphene monodisperse liquid , then the graphene monodispersion and the copper powder mixture are placed in a ball milling tank for mechanical ball milling for 2h, the ball-to-material ratio in the ball milling tank is 50:1, the ball milling speed is 500rpm, and the total amount of the mixture is no more than 2...

Embodiment 3

[0076] Prepare 1wt% graphene-reinforced copper-based composite material, graphene and quasi-spherical copper powder are commercially available, and the specific steps are as follows:

[0077] (1) 1g graphene is mixed with 1000ml absolute ethanol, first carry out shear dispersion process in high-speed shear disperser, wherein, rotating speed is 4000rpm, time is 2h; Graphene is dispersed, the ultrasonic frequency is 50KHz, and the running time is 2h to obtain a graphene monodisperse liquid; 0.1kg of copper powder (20-40 μm in particle size, spherical shape) is added to the graphene monodisperse liquid, and then Put the mixture of graphene monodispersion and copper powder into a ball mill jar for mechanical ball milling for 4 hours, the ball-to-material ratio in the ball mill jar is 10:1, the ball mill speed is 400rpm, and the total amount of the mixture does not exceed 2 / 3 of the volume of the ball mill jar; graphite is obtained Mixture of ethylene / copper composite powder and et...

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PUM

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Abstract

The invention relates to the technical field of composite material preparation, in particular to a high-strength and high-conductivity graphene-reinforced copper-based composite material and its preparation method and application. The present invention adopts spherical copper powder as the matrix material, graphene as the reinforcing phase, and prepares nearly fully dense, conductive properties through steps such as graphene liquid phase dispersion, ball milling pre-dispersion, surface coating, hot isostatic pressing, and hot extrusion. Good, high tensile strength, high hardness and high elongation of high-strength and high-conductivity graphene-reinforced copper-based composite materials. The method has good process controllability, is easy to produce on a large scale, and the obtained high-strength and high-conductivity graphene-reinforced copper-based composite material has a uniform structure, and the interface between graphene and the matrix is ​​well bonded, and the performance is stable. Huge application prospects.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a high-strength and high-conductivity graphene-reinforced copper-based composite material and its preparation method and application. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. In 2004, British scientists successfully prepared graphene flakes for the first time. The internal carbon atoms are all bonded by σ bonds with extremely high bonding strength, and each carbon atom can provide an unbonded free electron. This unique structure determines its high strength and good electrical conductivity, its strength is as high as 130GPa, and the carrier mobility is 15000cm 2 / (Vs), both are the most known materials. Not only that, graphene also has a high specific surface area and thermal conductivity, as well as unique properties such as molecular, quantum, and tunnel effects. [0003] Cop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F1/00B22F1/02B22F3/04B22F3/15B22F3/20C22C1/05C22C9/00
CPCC22C1/05C22C9/00B22F3/04B22F3/15B22F3/20B22F9/04B22F2998/10B22F2003/208B22F2009/043B22F1/108B22F1/16B22F1/145
Inventor 王德升王鹏云冯岩
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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