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Al4C3 modified Al-based composite and preparation method thereof

A composite material, al4c3 technology, which is applied in the field of Al4C3 modified Al-based composite materials and its preparation, can solve the problem of graphene being not uniformly distributed, achieve wide industrial application prospects, low equipment investment, and simple process effects

Active Publication Date: 2017-09-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the comprehensive properties of the graphene-reinforced aluminum matrix composites prepared by the prior art are relatively excellent, the graphene cannot be evenly distributed in the aluminum matrix, nor can a more effective interfacial bond be achieved between the graphene and the aluminum matrix.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) First, freeze the pure aluminum powder at -150°C for 2.0 hours. (2) After mixing aluminum powder and graphene, utilize high-energy ball mill to carry out ball milling to above-mentioned mixed frozen aluminum powder, ball milling time is 0.22 hours, and the addition amount of graphene is 0.2%, and ball material ratio is 4.5:1, and rotating speed is 420rpm , to keep the particle size at 300~400 mesh. During the above ball milling process, 0.08% Al was gradually added 4 C 3Powder, so that the interface bonding of graphene-coated aluminum powder is further strengthened. (3) The obtained graphene-coated aluminum mixed powder is molded at a pressure of 680MPa, and cold-pressed after holding the pressure for 10min under this pressing pressure. (4) Put the blank formed by cold pressing into the heating equipment protected by inert gas Ar gas for sintering, the sintering temperature is 500°C, and the sintering time is 1.0h. After testing, its density reaches 99.2%, and i...

Embodiment 2

[0030] (1) First, freeze the pure aluminum powder at -200°C for 1.0 hour. (2) After aluminum powder and a certain amount of graphene are mixed, utilize high-energy ball mill to carry out ball milling to above-mentioned mixed frozen aluminum powder, ball milling time is 0.2 hour, and the addition of graphene is 0.3%, and ball-to-material ratio is 4.5:1, The rotating speed is 310rpm to keep the particle size between 100-500 mesh. (3) While ball milling the aluminum powder and a certain amount of graphene after mixing, add 0.10% Al gradually 4 C 3 Powder, so that the interface bonding of graphene-coated aluminum powder is further strengthened. (4) The obtained graphene-coated aluminum mixed powder is molded, and the pressure is between 730MPa, and it is cold-pressed after holding the pressure for 20min under this pressing pressure. (5) Put the blank formed by cold pressing into the heating equipment with inert gas Ar gas protection for sintering, the sintering temperature is 5...

Embodiment 3

[0032] (1) First, freeze the pure aluminum powder at -120°C for 2.5 hours. (2) After aluminum powder and a certain amount of graphene are mixed, utilize high-energy ball mill to carry out ball milling to above-mentioned mixed frozen aluminum powder, ball milling time is 0.26 hour, and the addition of graphene is 0.5%, and ball-to-material ratio is 4.5:1, The rotating speed is 450rpm to keep the particle size between 100-500 mesh. (3) While ball milling the aluminum powder and a certain amount of graphene after mixing, add 0.16% Al gradually 4 C 3 Powder, so that the interface bonding of graphene-coated aluminum powder is further strengthened. (4) The obtained graphene-coated aluminum mixed powder is molded, and the pressure is between 750MPa, and it is cold-pressed after holding the pressure for 30min under this pressing pressure. (5) Put the blank formed by cold pressing into the heating equipment protected by inert gas Ar gas for sintering, the sintering temperature is 55...

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Abstract

The invention discloses an Al4C3 modified Al-based composite and a preparation method thereof. The Al4C3 modified Al-based composite is prepared through the following method. The method comprises the steps that (1) oxidized graphene is prepared; (2) then pure aluminum powder is frozen at a low temperature to be kept for a period of time; (3) after the aluminum powder and a certain amount of graphene are mixed, a high-energy ball grinder is utilized for carrying out ball grinding on the above mixed frozen aluminum powder; (4) ball grinding is carried out after the aluminum powder and a certain amount of graphene are mixed, meanwhile, a small amount of Al4C3 powder is added gradually, and graphene coated aluminum powder interface bonding is further enhanced; (5) prepared graphene coated aluminum mixed powder is formed at certain pressure, and pressure maintaining is carried out under the pressing pressure; and (6) a blank obtained after cold pressing forming is put into heating equipment with inert gas shielding to be sintered, and finally the graphene coated aluminum-based composite excellent in comprehensive performance is prepared. The Al4C3 modified Al-based composite can be conveniently applied and popularized to the electronic industry.

Description

technical field [0001] The present invention relates to an Al 4 C 3 A modified Al-based composite material and a preparation method thereof belong to the field of metal materials. Background technique [0002] Composites can generally be divided into three categories: polymer matrix composites (PMCs), metal matrix composites (MMCs), and ceramic matrix composites (CMCs). The matrix of metal matrix composites is mainly aluminum, nickel, magnesium, titanium, etc. Aluminum has many characteristics in making composite materials, such as light weight, low density, good plasticity, easy to master aluminum matrix composite technology, and easy processing. In addition, the aluminum matrix composite material has high specific strength and specific stiffness, good high temperature performance, more fatigue and wear resistance, good damping performance, and low thermal expansion coefficient. Like other composite materials, it can combine specific mechanical and physical properties t...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C1/05
CPCC22C1/05C22C21/00
Inventor 刘和平孙凤儿荆兴斌刘斌裴海祥高一波姬秀芳
Owner ZHONGBEI UNIV
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