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Method for preparing graphene reinforced aluminum matrix composite material by microwave sintering

A microwave sintering and composite material technology, which is applied in the field of metal matrix composite material preparation, can solve the problems of hindering heat flow, poor interface bonding, and large interface thermal resistance, achieving good compactness, shortening preparation time, and saving costs.

Active Publication Date: 2016-08-17
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems in the preparation technology of graphene / Al composite materials are: (1) Graphene will agglomerate in the aluminum matrix. Large resistance and poor thermal conductivity; (2) The graphene / Al composite material prepared by the traditional powder metallurgy method has poor compactness and many defects such as pores, which hinder the flow of heat

Method used

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  • Method for preparing graphene reinforced aluminum matrix composite material by microwave sintering
  • Method for preparing graphene reinforced aluminum matrix composite material by microwave sintering
  • Method for preparing graphene reinforced aluminum matrix composite material by microwave sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1: Add 0.05 grams of graphene nano-chips into 50 ml of absolute ethanol, and ultrasonically vibrate for 30 minutes to obtain a graphene dispersion;

[0021] Step 2: Add 10 grams of aluminum powder to 50 ml of absolute ethanol, and oscillate ultrasonically for 25 minutes to obtain an aluminum powder dispersion;

[0022] Step 3: Mix the above-mentioned aluminum powder dispersion and graphene dispersion, and ultrasonically mix for 1.5 hours to obtain a mixed slurry; place the mixed slurry in a ball mill tank, vacuumize the ball mill tank, fill it with argon protection, seal it, and place it On the machine base, the cold air generated by the liquid nitrogen refrigeration system is continuously input into the planetary ball mill equipped with a heat preservation cover. The cold air absorbs and takes away the heat generated by the high-speed rotating ball mill tank in time, so that the ball mill tank is always in a certain low temperature environment. Among them, low-tem...

Embodiment 2

[0026] Step 1: Add 0.2 grams of graphene nano-chips into 50 ml of absolute ethanol, and ultrasonically vibrate for 100 minutes to obtain a graphene dispersion;

[0027] Step 2: Add 10 grams of aluminum powder to 50 ml of absolute ethanol, and ultrasonically oscillate for 50 minutes to obtain an aluminum powder dispersion; mix the above aluminum powder dispersion with graphene dispersion, and ultrasonically mix for 2.5 hours to obtain a mixed slurry; mix the mixed slurry The body is placed in the ball mill jar, after vacuuming the ball mill jar, it is filled with argon gas for protection and then sealed, and placed on the machine base, the cold air generated by the liquid nitrogen refrigeration system is continuously input into the planetary ball mill equipped with a heat preservation cover, and these cold air will be transferred at a high speed The heat generated by the rotating ball milling tank is absorbed and taken away in time, so that the ball milling tank is always in a c...

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Abstract

The invention discloses a method for preparing a graphene reinforced aluminum matrix composite material by microwave sintering, comprising the steps of: taking graphene nano microchips and aluminum powder as raw materials, carrying out ultrasonic treatment to respectively prepare graphene dispersion liquid and aluminum powder dispersion liquid; mixing the two kinds of dispersion liquid, and carrying out low temperature ball milling, vacuum drying, press forming and microwave sintering to obtain the graphene reinforced aluminum matrix composite material with high density, high strength and high thermal conductivity. The method adopts an ethanol ultrasonic dispersion and ball milling combined method to enable the graphene to evenly disperse in the aluminum matrix, and adopts a microwave sintering technology, thus shortening the preparation time and being highly efficient and energy-saving; the production process is safe and pollution-free, and simultaneously the prepared graphene reinforced aluminum matrix composite material has high density and good heat-conducting property.

Description

technical field [0001] The invention relates to a method for preparing a graphene-reinforced aluminum matrix composite material by microwave sintering, and specifically belongs to the field of metal matrix composite material preparation. Background technique [0002] Graphene is a new type of two-dimensional carbon material with the thickness of a single carbon atom, which has excellent mechanical properties, such as high specific strength and stiffness. At the same time, graphene has a large specific surface area, high electrical and thermal conductivity. The excellent mechanical, thermal and electrical properties of graphene make it have broad application prospects in the field of composite materials, especially metal matrix composite materials. Graphene can be used with various metals (such as Al, Cu, Ni, etc.) The comprehensive performance broadens the application field of matrix metal matrix composites, has great research value, and lays the foundation for the reali...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C21/00
CPCC22C1/05C22C1/1005C22C21/00
Inventor 李多生廖小军左敦稳刘志雷叶寅谭树杰蒋磊李锦锦洪跃
Owner NANCHANG HANGKONG UNIVERSITY
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