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Graphene modified metal composite material, preparation method and workpiece

A metal composite material, graphene modification technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as graphene and metal materials cannot be uniformly mixed, composite materials with uneven composition, and graphene is easy to agglomerate.

Active Publication Date: 2021-05-28
北京石墨烯技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in density between graphene and metal powders, and the fact that graphene is easy to agglomerate, it is difficult to disperse both graphene and metal powders in the traditional composite material preparation method, graphene and metal materials cannot be mixed uniformly, and the uneven composition causes composite materials cannot meet existing needs

Method used

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  • Graphene modified metal composite material, preparation method and workpiece
  • Graphene modified metal composite material, preparation method and workpiece
  • Graphene modified metal composite material, preparation method and workpiece

Examples

Experimental program
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Effect test

preparation example Construction

[0027] see figure 1 , the embodiment of the present invention provides a method for preparing a graphene-modified metal composite material, comprising the following steps:

[0028] S10, metal powder and graphene nanosheet dispersion liquid are provided, and described graphene nanosheet dispersion liquid comprises graphene nanosheet, and the mass ratio of described metal powder body and described graphene nanosheet is (100~1000): 1;

[0029] S20, placing the metal powder in the cavity of the die casting machine, placing the graphene nanosheet dispersion in the pressure chamber of the die casting machine, and making the graphene nanosheet dispersion Enter the cavity of the die casting machine and mix with the metal powder, and the mixture is dried to obtain a graphene metal mixed powder, wherein the injection specific pressure of the die casting machine is 10MPa~40MPa, and the injection speed is 0.5m / s~4m / s, the holding time is 20s~240s; and

[0030] S30, forming and sinteri...

Embodiment 1

[0069] (1) Provide metal dispersion

[0070] Metal material: spherical pure aluminum powder with a particle size of 30 microns to 60 microns, and an oxygen content of 800 ppm. First solvent: deionized water. First dispersant: polyvinyl alcohol.

[0071] Stir 2g of polyvinyl alcohol in 198g of deionized water at a temperature of 95°C for 1 hour to fully dissolve and place it at room temperature; add 100g of spherical aluminum powder with a particle size of 30 microns to 60 microns into the polyvinyl alcohol aqueous solution, Stir and mix evenly. The mixing time is 3 hours to obtain a spherical pure aluminum powder dispersion. After standing still, pour out the supernatant.

[0072] (2) Preparation of metal powder

[0073] The metal dispersion after removing most of the dispersant in step (1) is put into an oven for drying, and the temperature of the oven is set at 60° C. to obtain a spherical pure aluminum powder with a water content of less than 1%.

[0074] (3) Provide gr...

Embodiment 2

[0083] The preparation method is basically the same as in Example 1, except that the specific injection pressure is 20 MPa. Example 3

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Abstract

The invention relates to a preparation method of a graphene modified metal composite material. The preparation method comprises the following steps that metal powder and a graphene nanosheet dispersion liquid are provided, the graphene nanosheet dispersion liquid comprises graphene nanosheets, and the mass ratio of the metal powder to the graphene nanosheets is (100-1000): 1; the metal powder is placed in a cavity of a pressure casting machine, the graphene nanosheet dispersion liquid is placed in a pressure chamber of the pressure casting machine, the graphene nanosheet dispersion liquid enters the cavity of the pressure casting machine to be mixed with the metal powder under the action of injection, the mixture is dried, and graphene metal mixed powder is obtained, the injection specific pressure of the pressure casting machine ranges from 10 MPa to 40 MPa, the injection speed ranges from 0.5 m / s to 4 m / s, and the pressure maintaining time ranges from 20 s to 240 s; and the graphene metal mixed powder is formed and sintered. The invention further relates to the graphene modified metal composite material and a workpiece.

Description

technical field [0001] The invention relates to the technical field of metal-based composite materials, in particular to a graphene-modified metal composite material, a preparation method and a product thereof. Background technique [0002] Metal materials are industrial basic materials, such as steel, aluminum, copper, titanium, etc., which are widely used in various fields of production and life. Modern aerospace and other high-end manufacturing industries have higher and higher requirements for the mechanical properties of metal materials such as strength and toughness, as well as physical properties such as thermal conductivity and electrical conductivity. However, traditional alloying methods are becoming more and more difficult to meet the material requirements. The research on the modification of metal materials is imminent. [0003] Graphene is a honeycomb two-dimensional planar structure material composed of carbon atoms. Due to its unique two-dimensional honeycomb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05B22F1/02B22F3/02B22F3/10
CPCC22C1/05B22F3/02B22F3/10B22F1/16
Inventor 曹振李佳惠孙庆泽李炯利王刚王旭东
Owner 北京石墨烯技术研究院有限公司
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