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High-strength and high-conductivity graphene/copper-aluminum composite material and preparation method thereof

A technology of copper-aluminum composite materials and graphene, which is applied in the field of electrical materials, can solve the problems of difficult graphene distribution, difficulty in control, and low production volume, and achieve the effects of low-cost preparation, uniform distribution, and easy operation

Inactive Publication Date: 2022-03-15
哈尔滨东大高新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The powder metallurgy process is simple, but it is difficult to solve the problem of uniform distribution of graphene on the copper base; the molecular level mixing method has a good dispersion effect of graphene, but the production capacity of this method is low, and the impurity ions are difficult to clean during the preparation process, which restricts the application and Promotion; CVD chemical vapor deposition method is to directly grow graphene on the surface of metal powder (such as copper and nickel) with catalytic effect. The core of this dispersion method is to grow graphene by CVD. The disadvantages of control and complex process are the main bottlenecks of this dispersion method.

Method used

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  • High-strength and high-conductivity graphene/copper-aluminum composite material and preparation method thereof
  • High-strength and high-conductivity graphene/copper-aluminum composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Powder mixing: 100 kg-320 mesh copper-aluminum powder and 0.05 kg of high-purity graphite powder with an average particle size of 4 μm are mixed for 3 hours, the ball-to-material ratio is 2:1, and the mass percentage of aluminum in the copper-aluminum powder is It is 0.002wt%.

[0030] 2. Pressing: The mixed powder is pressed into a billet of Φ100×400mm by isostatic pressing.

[0031] 3. Sintering: Sintering under the protection of argon, the sintering temperature is 900 degrees, heat preservation for 2 hours.

[0032] 4. Hot extrusion: Hot extrude the sintered billet into a 3×25mm plate, and the extrusion temperature is 800 degrees.

[0033] 5. Cold rolling: the plate is cold-rolled to a thickness of 0.5 mm by asynchronous rolling, the speed ratio is 2:1, and the deformation amount is 20% each time for annealing treatment, and the annealing temperature is 600 degrees.

[0034] 6. Punching: Cut the plate into small sections of 0.5×1×20mm.

[0035] 7. Pressing: pre...

Embodiment 2

[0041] 1. Powder mixing: 100 kg-320 mesh copper-aluminum powder and 0.1 kg of high-purity graphite powder with an average particle size of 2 μm are ball milled for 3 hours, the ball-to-material ratio is 3:1, and the mass percentage of aluminum in the copper-aluminum powder is It is 0.005wt%.

[0042] 2. Pressing: The mixed powder is pressed into a billet of Φ100×400mm by isostatic pressing.

[0043] 3. Sintering: Sintering under vacuum, the sintering temperature is 1000 degrees, heat preservation for 3 hours.

[0044] 4. Hot extrusion: the sintered billet is hot-extruded into a 2×25mm plate, and the extrusion temperature is 900 degrees.

[0045] 5. Cold rolling: the plate is cold-rolled to a thickness of 0.2 mm by asynchronous rolling, the speed ratio is 2:1, and the deformation amount is 20% each time for annealing treatment, and the annealing temperature is 600 degrees.

[0046] 6. Punching: Cut the plate into small sections of 0.2×1×20mm.

[0047] 7. Pressing: pressing t...

Embodiment 3

[0053] 1. Powder mixing: 100 kg-320 mesh copper-aluminum powder and 0.1 kg of high-purity graphite powder with an average particle size of 2 μm are ball-milled for 4 hours, the ball-to-material ratio is 5:1, and the mass percentage of aluminum in the copper-aluminum powder is 0.001 wt%.

[0054] 2. Pressing: The mixed powder is pressed into a billet of Φ100×400mm by isostatic pressing.

[0055] 3. Sintering: Sintering under vacuum, the sintering temperature is 1050 degrees, heat preservation for 4 hours.

[0056] 4. Hot extrusion: Hot extrude the sintered billet into a 3×20mm plate, and the extrusion temperature is 950 degrees.

[0057] 5. Cold rolling: the plate is cold-rolled to a thickness of 1 mm by asynchronous rolling, the speed ratio is 2:1, and the deformation amount is 20% each time for annealing treatment, and the annealing temperature is 700 degrees.

[0058] 6. Punching: Cut the plate into small sections of 0.2×1×20mm.

[0059] 7. Pressing: pressing the blanked ...

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Abstract

The invention aims to provide the high-strength and high-conductivity graphene / copper-aluminum composite material and the preparation method thereof. The method is easy to operate and high in efficiency. The method comprises the following steps: uniformly mixing copper-aluminum powder and high-purity graphite powder, pressing into a billet, sintering and preserving heat; thermally extruding the blank into a plate; cold rolling and annealing treatment are conducted, and the plate is cut into small sections and then pressed into billets; continuously sintering, then loading the blank into a copper sheath, and peeling and thermally extruding the sheath into a plate; and continuously repeating cold rolling and subsequent steps for multiple times to obtain the graphene / copper-aluminum composite material. According to the method disclosed by the invention, the original physical characteristics of the graphene are maintained, the graphene is uniformly distributed in the composite material, the tensile strength of the composite material prepared by the method is greater than 450MPa, and meanwhile, the conductivity of 90% IACS or above can also be maintained.

Description

technical field [0001] The invention relates to the field of electrical materials, in particular to a high-strength and high-conductivity graphene / copper-aluminum composite material and a preparation method thereof. Background technique [0002] High-strength and high-conductivity copper-based composite materials have broad application prospects in rail transit, long-distance power transmission and other industries. Among them, graphene-reinforced copper-based composite materials are the most promising new materials. The key issues of graphene-reinforced metal-based composite materials are mainly It lies in: 1. The dispersion uniformity of graphene in the matrix; 2. The interfacial interaction between graphene and the metal matrix; 3. The integrity of the graphene structure. 4. At the same time, as a large-scale application, the economical issues of materials and processing must also be considered. [0003] Single-layer and few-layer graphene has complete structure and exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C9/00C22C9/01B22F3/16B22F3/10B22F3/20B22F3/18
CPCC22C1/05C22C9/00C22C9/01B22F3/162B22F3/1007B22F3/20B22F3/18B22F2003/208
Inventor 杨丛涛
Owner 哈尔滨东大高新材料股份有限公司