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Graphene-copper composite material preparation method

A composite material and graphene technology, which is applied in metal material coating technology, manufacturing tools, heat treatment equipment, etc., can solve problems such as uneven distribution, high probability of graphene agglomeration, and influence on metal material compounding, so as to improve mechanical properties , combined with the effect of compactness and good mechanical properties

Inactive Publication Date: 2019-05-28
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene in the graphene-copper composite material prepared by the traditional ball milling method is distributed in the material in the form of small flakes, which is unevenly distributed; and the probability of graphene agglomeration is relatively high, resulting in uneven dispersion of graphene in the matrix, which seriously Affect the compounding of metal materials, thereby affecting the mechanical properties of graphene-copper composite materials. In addition, the ball milling method is very destructive to the structure of graphene, which will seriously affect the electrical conductivity and thermal conductivity of composite materials.

Method used

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  • Graphene-copper composite material preparation method

Examples

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Embodiment 1

[0021] see figure 1 , a kind of graphene-copper composite material preparation method, comprises the steps:

[0022] S1: Put the copper foil into the tube furnace to anneal the copper foil;

[0023] S2: keep the temperature in the tube furnace constant, and pass H into the tube furnace 2 Reduction of copper foil;

[0024] S3: Introduce CH into the tube furnace 4 As a carbon source, vapor deposition is performed on the surface of the copper foil to grow graphene on both sides of the copper foil. After vapor deposition, the copper foil is quickly taken out and transferred to the cooling zone to cool to room temperature. The atmosphere in the cooling zone is Ar gas;

[0025] S4: Take two or more copper foils with double-sided graphene growth and stack them in sequence, and perform vacuum hot pressing to obtain a graphene-copper composite material, wherein the pressure and temperature of the vacuum hot pressing process increase synchronously;

[0026] S5: cooling the graphene-...

Embodiment 2

[0031] Take a copper foil with a thickness of 25um, anneal at 1000°C for 1h and 2 After reduction for 15min, CH was introduced at 1010°C 4 Vapor deposition as a carbon source, CH 4 The gas flow rate was 50 sccm, the vapor deposition time was 20 min, and then naturally cooled to room temperature in Ar.

[0032] Take 15 pieces of copper foils treated by the above process to prepare graphene-copper composite materials by vacuum hot pressing. Start heating at 10°C / min to 200°C, keep the pressure constant, and keep warm for 1 hour; after the heat preservation, carry out a second rise in temperature, stop the temperature rise when the temperature rises to 1000°C, adjust the pressure to 40MPa at the same time, and keep warm for 1.5h. The thickness of the graphene-copper composite obtained after cooling is 0.87mm.

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Abstract

The invention belongs to the field of graphene-copper composite materials, and discloses a graphene-copper composite material preparation method. Through a vapor deposition method, graphene grows on the double faces of copper foil, and then two or more copper foil with the graphene growing on the double faces are synthesized into a graphene-copper composite material through a vacuum hot pressing process, wherein the pressure and the temperature of the vacuum hot pressing process rise in a gradient manner synchronously. According to the graphene-copper composite material preparation method, through the vapor deposition method, the single-layer graphene grows on the two faces of the copper foil, the graphene-copper composite material is synthesized through the vacuum hot pressing process, and therefore the graphene is uniformly distributed on the double faces of the copper foil, so that the composite material has good mechanical performance, conductive performance and heat conducting performance; and meanwhile, the pressure and the temperature of the vacuum hot pressing process rise in the gradient manner synchronously, it is avoided that large hot stress is generated in the copper foil where the graphene grows on the double faces in the vacuum hot pressing process, so that combination between every two adjacent copper foil is more compact, and the mechanical performance of the composite material is further improved easily.

Description

technical field [0001] The invention belongs to the field of graphene-copper composite materials, and in particular relates to a preparation method of graphene-copper composite materials. Background technique [0002] Graphene is a two-dimensional material with a honeycomb structure formed by carbon atoms through SP2 hybridization. This material has excellent electrical conductivity, heat transfer, light transmission and flexibility properties, so it is widely used in many applications typified by optoelectronic devices. In addition, under the premise of achieving graphene (especially graphene single crystal) bandgap regulation and fast, low-cost preparation, graphene may even replace traditional semiconductor materials such as silicon and germanium, and become the basic material of the next generation of information integration devices. . [0003] Graphene in the graphene-copper composite material prepared by the traditional ball milling method is distributed in the mater...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C9/00C22F1/08C23C16/26C21D9/46
Inventor 吴桂林李昕朱月月
Owner CHONGQING UNIV
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