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Foam graphene skeleton reinforced copper-base composite material and preparation method thereof

A technology of copper-based composite materials and foamed graphene, which is applied in metal material coating technology, gaseous chemical plating, coating, etc., can solve the problem of difficulty in finely controlling the connectivity of three-dimensional porous skeletons, multiple processing procedures, and three-dimensional pores. Contains problems such as gaps to achieve excellent continuous thermal conductivity, electrical conductivity and improved mechanical strength

Active Publication Date: 2016-05-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional mechanical processing method is multi-dimensional processing, with many processing steps and high cost
In addition, mechanical processing is restricted by traditional mechanical processing methods and equipment, and it is difficult to finely control the internal pore size and connectivity of the three-dimensional porous framework.
Using the method of metal wire weaving, there are gaps in the three-dimensional pores, and the process is complicated.

Method used

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  • Foam graphene skeleton reinforced copper-base composite material and preparation method thereof
  • Foam graphene skeleton reinforced copper-base composite material and preparation method thereof
  • Foam graphene skeleton reinforced copper-base composite material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] Foamed graphene skeleton reinforced copper-based composite material, in this example, the pore size is 0.2mm titanium foam as the substrate, the foamed graphene reinforcement accounts for 8% of the volume fraction of the composite material, first according to step (1) on the foamed titanium three-dimensional network substrate Cleaning, followed by step (2) using magnetron sputtering technology to deposit a molybdenum film with a thickness of 50nm on the surface of the foam titanium three-dimensional network skeleton as an intermediate transition layer; A foam skeleton substrate of crystalline diamond particles; (4) adopting hot wall CVD to deposit graphene film, specifically: heating to 950° C. in an atmosphere of H2 and Ar (the flow rates of H2 and Ar during the heating process were 200 and 500 mL / min respectively , the heating rate is 33°C / min), heat treatment for 10min after the furnace temperature rises to 950°C; after the heat treatment is completed, a mixed gas of ...

Embodiment 2

[0048] Foamed graphene skeleton reinforced copper-based composite material, in this example, the pore size of 0.3mm nickel foam is used as the substrate, and the foamed graphene reinforcement accounts for 20% of the volume fraction of the composite material. Carry out cleaning, adopt the method for evaporation to deposit thickness be the chromium film of 300nm as the intermediate transition layer on the surface of nickel foam three-dimensional network framework by step (2) afterwards; Foam skeleton substrate of diamond particles; (4) hot wire CVD is used to deposit diamond film, deposition process parameters: hot wire distance 6mm, substrate temperature 850°C, hot wire temperature 2200°C, deposition pressure 3KPa, CH 4 / H 2 The volume flow ratio is 1:99, the deposition time is controlled to obtain a diamond film thickness of 200 μm, and the diamond three-dimensional network skeleton is obtained on the nickel foam substrate, and then on the diamond surface, graphene is grown in...

Embodiment 3

[0050] Foamed graphene skeleton reinforced copper-based composite material, in this example, tungsten foam with a pore size of 1mm is used as the substrate, and the foamed graphene reinforcement accounts for 10% of the volume fraction of the composite material. After cleaning, no intermediate transition layer is added, and the in-situ growth graphene film is directly utilized by chemical vapor deposition; then according to step (3), a foam skeleton substrate inlaid with a large number of nanocrystalline and microcrystalline diamond particles in the middle of the mesh is obtained; (4) using The graphene film was deposited by hot-wall CVD, specifically: heating to 950°C in an atmosphere of H2 and Ar (the flow rates of H2 and Ar during the heating process were 200 and 500mL / min, and the heating rate was 33°C / min), and the furnace temperature After heating to 950°C, heat treatment for 10 minutes; after the heat treatment is completed, a mixed gas of CH4, H2 and Ar is introduced (ga...

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Abstract

The invention discloses a foam graphene skeleton reinforced copper-base composite material and a preparation method thereof. The composite material consists of a foam substrate, a graphene reinforcing layer and a base material, wherein the foam substrate is foam metal, foam ceramic or foam carbon; the graphene reinforcing layer is a graphene film or combination of graphene and diamond and a carbon nanotube; and the base material comprises aluminum and an aluminum base alloy. In the composite material disclosed by the invention, since graphene and aluminum are continuously distributed in a three-dimensional space to form a network interpenetrating structure, remarkable influence on the thermal and electric properties of the material caused by the compound interface is weakened, the reinforcing phase can form a whole without reducing the good plasticity and toughness of the metal base in the composite material, and the heat conduction efficiency and electric conduction efficiency of the reinforcing body are maximized so that the thermal conductivity, electric conductivity and mechanical strength of the composite material are remarkably improved over traditional composite materials; and therefore, the foam graphene skeleton reinforced copper-base composite material is a novel multifunctional composite material with great potential.

Description

technical field [0001] The invention discloses a foamed graphene skeleton-reinforced copper-based composite material and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] Graphene is a two-dimensional crystal that is exfoliated from graphite material and composed of carbon atoms with only one layer of atomic thickness. In 2004, Andre Geim and Konstantin Novoselov, physicists at the University of Manchester, successfully separated graphene from graphite and confirmed that it can exist alone. Bell Prize in Physics. Graphene is both the thinnest material and the strongest, with a breaking strength 200 times stronger than the best steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. It is currently the thinnest and strongest material in nature. If a piece of graphene with an area of ​​1 square meter is used to make a hammock, it can bear a cat weig...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/10C23C16/26C23C16/50
CPCC22C1/101C22C1/1036C22C9/00C22C26/00C22C2026/002C23C16/26C23C16/50
Inventor 魏秋平马莉周科朝余志明叶文涛
Owner CENT SOUTH UNIV
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