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Preparation method of graphene aluminum-based composite material

A technology of aluminum-based composite materials and graphene, which is applied in the field of preparation of graphene-aluminum-based composite materials, can solve problems such as low strength and low graphene volume fraction, achieve low thermal expansion coefficient, simple preparation process, and overcome non-wetting Effect

Active Publication Date: 2014-10-01
HARBIN XIANGKE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low strength of existing graphene-aluminum-based composite materials and low volume fraction of graphene in composite materials, and provides a preparation method of graphene-aluminum-based composite materials

Method used

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  • Preparation method of graphene aluminum-based composite material
  • Preparation method of graphene aluminum-based composite material
  • Preparation method of graphene aluminum-based composite material

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of a kind of graphene aluminum-based composite material of the present embodiment is carried out according to the following steps:

[0021] 1. Put pure aluminum powder or aluminum alloy powder in a ball mill jar, vacuumize it and fill it with protective gas, then carry out ball milling. The mass ratio of balls to materials is (3~5):1, and the milling time is 2h~ 3h, the rotation speed is 120rpm~250rpm, and aluminum metal powder is obtained;

[0022] The particle size of the pure aluminum powder is 25 mesh to 500 mesh;

[0023] The particle size of the aluminum alloy powder is 25 mesh to 500 mesh;

[0024] 2. Put the graphene and the aluminum metal powder obtained in step 1 into a ball mill jar, vacuumize and fill with protective gas, and then carry out ball milling. The mass ratio of balls to materials is (3-10): 1, and the ball milling time for 2h~6h, and the rotation speed is 200rpm~400rpm to obtain composite powder; ...

specific Embodiment approach 2

[0031] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the aluminum alloy powder described in step 1 is Al-Si alloy powder, Al-Cu alloy powder, Al-Mg alloy powder, Al- One or one of Si-Cu alloy powder, Al-Si-Mg alloy powder, Al-Cu-Mg alloy powder, Al-Si-Cu-Mg alloy powder and Al-Zn-Mg alloy powder A mixture of several. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the grinding balls described in step 1 are steel balls or ceramic balls or a mixture of several of them. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of a graphene aluminum-based composite material. The invention relates to the technical field of preparation of new materials, and particularly relates to a preparation method of a graphene aluminum-based composite material, aiming at solving the problems that an existing graphene aluminum-based composite material is low in strength and the volume percentage of graphene in the composite material is low. The method comprises the following steps: I. preparing aluminum metal powder; II. preparing a composite powder body; III. preparing preforms; IV. smelting molten aluminum; and V. infiltrating the molten aluminum into clearances of the preforms by utilizing pressure infiltration, maintaining pressure, conducting mold cooling, and demolding to obtain the graphene aluminum-based composite material. The graphene aluminum-based composite material prepared by adopting the preparation method is uniform in components, high in density, lower in cost, and larger in size.

Description

technical field [0001] The invention relates to the technical field of preparation of new materials, in particular to a method for preparing a graphene-aluminum matrix composite material. Background technique [0002] Graphene is a new type of two-dimensional material, which has excellent mechanical properties comparable to carbon nanotubes, and also has excellent thermophysical properties such as low thermal expansion coefficient and high thermal conductivity, and has unique quantum effects. Therefore, compounding graphene and aluminum metal to prepare graphene-aluminum matrix composite materials will have excellent properties such as light weight, high strength, low thermal expansion and high thermal conductivity, and meet the needs of actual aerospace and other structural parts and microelectronic packaging fields. [0003] At present, the research on graphene-aluminum matrix composites has not been extensively researched due to the high cost of graphene and the difficult...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/00
Inventor 武高辉肖瑞武强
Owner HARBIN XIANGKE NEW MATERIAL