Aluminum-coated graphite composite powder, aluminum-graphite composite comprising composite powder and preparation method thereof

A composite powder and composite material technology, applied in transportation and packaging, metal processing equipment, coatings, etc., can solve the problems of chemical copper/nickel plating process limitations on graphite surface, graphite segregation and other problems

Inactive Publication Date: 2016-06-22
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an aluminum-graphite composite powder, an aluminum-graphite composite material containing the composite powder and a preparation method thereof,

Method used

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  • Aluminum-coated graphite composite powder, aluminum-graphite composite comprising composite powder and preparation method thereof
  • Aluminum-coated graphite composite powder, aluminum-graphite composite comprising composite powder and preparation method thereof
  • Aluminum-coated graphite composite powder, aluminum-graphite composite comprising composite powder and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0069] This embodiment provides an aluminum-coated graphite composite powder, which is prepared by the following steps:

[0070] (1) Raw material selection: choose nano-aluminum powder with a particle size of 80 nanometers as the coating material, and choose graphite with a particle size of 50 microns as the coating core; regard the total integral fraction of nano-aluminum powder and graphite as 100vol%, and nano-aluminum powder The volume fraction of graphite is 60vol%, and the volume fraction of graphite is 40vol%; The quality of binder accounts for the 5wt% of nanometer aluminum powder, graphite and binder total mass, and the proportioning of binder is: epoxy resin: epoxy resin Thinner: ethylenediamine=8:10:3.

[0071](2) After weighing the raw materials according to the mass ratio of step (1), mix the weighed nano-aluminum powder and graphite for 5-10 minutes, then pour the mixed solution of epoxy resin and epoxy thinner, and mix for 5-10 minutes. After 10 minutes, add et...

Embodiment 2

[0076] This embodiment provides an aluminum-graphite composite material. The aluminum substrate of this embodiment is 6061 aluminum with a thickness of 41 to 53 microns, which is prepared by the following steps:

[0077] (1) Using the aluminum-coated graphite composite powder prepared in Example 1 to prepare an aluminum-graphite composite material with a graphite content of 5 vol%, it is necessary to calculate the required quality of 6061 aluminum according to the content of nano-aluminum and graphite.

[0078] (2) Weigh the required raw materials according to the above mass ratio, put the aluminum-coated graphite composite powder and 6061 aluminum particles into the mixer (optional four-barrel aviation star mixer) and mix for 30 minutes to obtain high-pressure sintering raw materials Composite powder.

[0079] (3) Perform high-pressure sintering on the high-pressure sintering raw material composite powder obtained in step 2. The process parameters are: sintering temperature 5...

Embodiment 3

[0082] This embodiment provides an aluminum-graphite composite material. The aluminum substrate of this embodiment is 6061 aluminum with a thickness of 41 to 53 microns, which is prepared by the following steps:

[0083] (1) Using the aluminum-coated graphite composite powder prepared in Example 1 to prepare an aluminum-graphite composite material with a graphite content of 10 vol%, it is necessary to calculate the required mass of 6061 aluminum according to the content of nano-aluminum and graphite.

[0084] (2) Weigh the required raw materials according to the above mass ratio, put the aluminum-coated graphite composite powder and 6061 aluminum particles into the mixer (optional four-barrel aviation star mixer) and mix for 30 minutes to obtain high-pressure sintering raw materials Composite powder.

[0085] (3) Perform high-pressure sintering on the high-pressure sintering raw material composite powder obtained in step 2. The process parameters are: sintering temperature 450...

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Abstract

The invention provides aluminum-coated graphite composite powder, an aluminum-graphite composite comprising the composite powder and a preparation method thereof. The aluminum-coated graphite composite powder comprises nanoscale aluminum powder or aluminum alloy powder, graphite and an adhesive, wherein the particle size of the nanoscale aluminum powder or aluminum alloy powder is 50-100nm; the particle size of the graphite is 20-70 microns; the graphite is a coated core; the adhesive is composed of epoxy resin and/or phenolic resin, diluted epoxy liquid, ethylenediamine and/or an NL curing agent; the nanoscale aluminum powder or aluminum alloy powder is coated on the surface of the graphite via the adhesive. Through the aluminum-coated graphite composite powder, the problems of the segregation of the graphite in the preparation process of the aluminum-graphite composite and the limitation of a process of chemically plating copper/nickel on the surface of the graphite can be solved.

Description

technical field [0001] The invention relates to the field of aluminum-based composite materials, in particular to an aluminum-coated graphite composite powder, an aluminum-graphite composite material containing the composite powder and a preparation method thereof. Background technique [0002] Particle-reinforced aluminum matrix composites are favored by people because of their excellent performance and low cost. At present, the particle-reinforced phases include alumina, silicon carbide, titanium carbide and graphite. The addition of graphite particles can significantly improve the wear resistance, friction reduction and self-lubricating properties of the material, and at the same time greatly improve the expansion coefficient of the material. Therefore, the composite material can be used to manufacture wear-resistant parts such as pistons, cylinder liners, and bearing bushes, and can also be used for shock absorption. Parts have broad application prospects. [0003] At p...

Claims

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Application Information

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IPC IPC(8): B22F1/02C22C1/05C22C21/00
CPCC22C1/05C22C21/00B22F2998/10B22F1/17B22F1/0003B22F2003/145
Inventor 许磊霍晓阳王有超鲁宁宁刘宝忠历长云米国发邵春娟刘晨易善伟
Owner HENAN POLYTECHNIC UNIV
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