Preparation method of graphene reinforced copper-based composite material

A copper-based composite material and graphene technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problems of no significant improvement in electrical and thermal conductivity, and small material bearing capacity, so as to improve mechanical and physical properties, Effective performance, high magnetization effect

Active Publication Date: 2019-12-17
YANSHAN UNIV
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Problems solved by technology

[0004] However, the existing prepared graphene-reinforced metal matrix composites are all isotropic materials, and in the actual use of materials, many materials pay attention to the mechanical or physical properties in a specific direction, such as rod-shaped component load-bearing beams, Wheel shafts and so on mainly emphasize the mechanical properties in the length direction, because the bearing capacity of materials in other directions is relatively small; similarly, for the existing graphene-enhanced functional composite materials, although graphene itself is a good electrical and thermal conductor , but there is no significant improvement in the overall electrical and thermal conductivity

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  • Preparation method of graphene reinforced copper-based composite material
  • Preparation method of graphene reinforced copper-based composite material
  • Preparation method of graphene reinforced copper-based composite material

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[0048] An embodiment of the present invention provides a method for preparing a graphene-reinforced copper-based composite material, the method for preparing the composite material comprising:

[0049] Prepare flake copper powder;

[0050] Graphene is nickel-plated to obtain nickel-plated graphene;

[0051] The flake copper powder and the nickel-plated graphene are ball-milled to obtain a mixed powder;

[0052] performing countercurrent rotational orientation treatment on the mixed powder under a magnetic field to obtain a composite powder compact;

[0053] The composite powder compact is sintered to obtain a graphene-reinforced copper-based composite material.

[0054] Above-described embodiment adopts pre-prepared flake copper powder, and flake copper powder is conducive to the dispersion of graphene; Carry out nickel plating to graphene simultaneously, increases the paramagnetism of graphene; The mixing of flake copper powder and nickel-plated graphene The powder is subj...

Embodiment 1

[0075] A preparation method of graphene-reinforced copper-based composite material, comprising the following steps:

[0076] To prepare flake copper powder, put gas-atomized spherical copper powder with a particle size of 45-109 μm into a ball mill tank, and add absolute ethanol as a process control agent to avoid excessive cold welding of copper powder during ball milling. The material ratio is 10:1, the ball milling speed is 250rpm, and the ball milling time is 10h in order to obtain copper powders with different sheet diameters. After ball milling, the copper powders are vacuum-dried at 60°C for 12h. Then, the dried powder is reduced with hydrogen in a tube-type reduction furnace, the reduction temperature is 400°C, and the reduction time is 3 hours; the reduced flake powder is screened with 200-mesh and 300-mesh sieves to obtain the particle size 48-75 μm flake powder to obtain the final flake copper powder.

[0077] For the sensitization treatment of graphene, first, the...

Embodiment 2

[0085] A preparation method of graphene-reinforced copper-based composite material, comprising the following steps:

[0086] To prepare flake copper powder, put gas-atomized spherical copper powder with a particle size of 45-109 μm into a ball mill tank, and add absolute ethanol as a process control agent to avoid excessive cold welding of copper powder during ball milling. The material ratio is 10:1, the ball milling speed is 250rpm, and the ball milling time is 10h in order to obtain copper powders with different sheet diameters. After ball milling, the copper powders are vacuum-dried at 60°C for 12h. Then, the dried powder is reduced with hydrogen in a tube-type reduction furnace, the reduction temperature is 400°C, and the reduction time is 3 hours; the reduced flake powder is screened with 200-mesh and 300-mesh sieves to obtain the particle size 48-75 μm flake powder to obtain the final flake copper powder.

[0087] For the sensitization treatment of graphene, first, the...

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Abstract

The invention discloses a preparation method of a graphene reinforced copper-based composite material. The method comprises the following steps of preparing flaky copper powder, and carrying out nickel plating on graphene to obtain nickel-plated graphene; carrying out mixing and ball-milling on the flaky copper powder and the nickel-plated graphene to obtain mixed powder, and carrying out countercurrent rotation orientation on the mixed powder under a magnetic field to obtain a composite powder compact; and sintering the composite powder compact to obtain the graphene reinforced copper-based composite material. According to the method, the flaky copper powder is prepared in advance, and meanwhile, the graphene is subjected to nickel plating, so that the paramagnetic property of the graphene is increased; and the flaky copper powder and nickel-plated graphene mixed powder are subjected to countercurrent rotation orientation in the magnetic field, the graphene oriented reinforced copper-based composite material is prepared after hot-pressing sintering, so that the mechanical and physical properties of the material are improved.

Description

technical field [0001] The invention relates to the technical field of metal-based composite materials, in particular to a preparation method of graphene-reinforced copper-based composite materials. Background technique [0002] Metal-matrix nanocomposites (MMNCs) are new materials composed of adding nano-reinforcements to a metal or alloy matrix by physical or chemical means. Compared with large-scale reinforced materials, nano-reinforcements have surface effects, small-scale effects and macroscopic quantum tunneling effects, and exhibit unique physical, chemical and mechanical properties. MMNCs can exert the synergistic effect of each component, and have the excellent characteristics of nano-reinforcement and metal matrix, such as high specific strength, high temperature resistance, corrosion resistance, good electrical and thermal conductivity, etc., and are widely used in machinery, electronics, national defense, etc. high-tech field. [0003] Graphene is a new dimensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C9/00B22F1/02B22F1/00B22F9/04B22F3/14B22F3/02
CPCC22C1/05C22C9/00B22F9/04B22F3/14B22F3/02B22F2009/043B22F2999/00B22F2998/10B22F1/068B22F1/145B22F1/17B22F2202/05
Inventor 战再吉曹海要王振春田锭坤张丹丹
Owner YANSHAN UNIV
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