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

A technology of copper-based composite materials and composite materials, which is applied in the direction of conductive materials, conductive materials, cable/conductor manufacturing, etc., can solve the problems of material electrical and thermal conductivity decline, material electrical conductivity improvement is small, and material electrical conductivity is affected. Saving resources, short process, and easy promotion and application

Active Publication Date: 2022-05-17
CRRC IND INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the obtained material has a certain strength, it mostly depends on the strength of the copper rod itself. Since the proportion of graphene in the whole material is very low, it not only does not bring a great improvement to the overall strength, but also brings The improvement of the conductivity of the material is also very small
At the same time, the method of converting graphene into graphene by adding a reducing agent after first generating graphene oxide leads to low purity of the generated graphene, and there is a large amount of graphite oxide that has not been reduced and is left on the surface of the copper strip, which will further affect the conductivity of the material performance
The special strong acid oxidation preparation process makes the graphene sheet have more defects and more functional groups, which will affect the conduction of electrons and phonons, and will also lead to a decrease in the electrical and thermal conductivity of the material.

Method used

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  • A high-strength and high-conductivity copper-based composite material and its preparation method
  • A high-strength and high-conductivity copper-based composite material and its preparation method
  • A high-strength and high-conductivity copper-based composite material and its preparation method

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Effect test

Embodiment 1

[0029] This embodiment provides a copper-based composite material, the specific preparation method is as follows (flow chart see figure 1 ):

[0030] (1) Use a vacuum hot-press furnace to stack and press 30 pieces of highly oriented metal copper foils with single-layer graphene induced by CVD. When the vacuum degree is lower than 1.0 -1 After Pa, start to heat up to 700°C, at 700°C, pressurize it with a pressure of 20MPa and keep the pressure for 8min, and press it into a composite material to be processed. Wherein, the copper foil deposited with graphene is used as the unit material, and during the lamination, the graphene layer of one unit material is placed in contact with the copper foil of the other unit material.

[0031] (2) Put the composite material to be processed into a ceramic sheath and place it in a hot isostatic high-pressure container hot-pressing sintering furnace. After sealing the pressure container, first raise the temperature in the container to 700°C and...

Embodiment 2

[0034] This embodiment provides a copper-based composite material. The difference between its preparation process and that of Embodiment 1 is that the pressure in step (2) is 100 MPa.

Embodiment 3

[0036] This embodiment provides a copper-based composite material. The difference between its preparation process and that of Embodiment 1 is that the pressure in step (2) is 110 MPa.

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Abstract

The invention relates to the field of metal composite materials, in particular to a high-strength and high-conductivity copper-based composite material and a preparation method thereof. The preparation method includes: (1) laminating two or more layers of copper foils deposited with graphene and performing hot pressing to form a graphene-copper composite material; (2) passing an inert gas at 700-900°C The graphene-copper composite material is subjected to hot isostatic pressing densification treatment under a pressure of 80-120 MPa. The metal high-strength and high-conductivity copper-based composite material prepared by the invention has good composite effect and has high strength and high conductivity. In addition, the preparation method has a short process and high efficiency, which is beneficial to reduce production costs and save resources, and is also environmentally friendly and convenient for popularization and application.

Description

technical field [0001] The invention relates to the field of metal composite materials, in particular to a high-strength and high-conductivity copper-based composite material and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, aerospace, transportation, mechanical industry, energy chemical industry, communication, electrical, power electronics and national defense have higher and higher requirements on the conductivity and mechanical properties of copper or copper alloys. In order to obtain high-strength and high-conductivity materials, the scientific community at home and abroad has developed high-strength and high-conductivity copper alloy materials and composite materials including Cu-Ag, Cu-Al, and Cu-Cr-Fe. However, most of the materials that have been developed are still in the experimental stage, and they have not been widely used because of the high cost of raw materials and complicated processing and prepara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/04H01B1/02C23C16/26
CPCH01B13/00H01B1/04H01B1/026C23C16/26Y02E60/10
Inventor 章潇慧栾益锋杨为三陈强李要君李明高孙帮成龚明
Owner CRRC IND INST CO LTD
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