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Preparation method for aluminum-graphene metallic composite

A metal composite material and graphene technology, applied in the field of functional materials, can solve problems such as difficulty in preparing graphene composite materials, and achieve the effects of low cost, simple preparation method and simple preparation process

Active Publication Date: 2017-02-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since carbon materials such as graphene are very light materials compared to metal aluminum, it is difficult to prepare composite materials in which graphene can be uniformly distributed in aluminum metal by conventional methods

Method used

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  • Preparation method for aluminum-graphene metallic composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of basic electrolyte.

[0022] Add 0.5g of aluminum trifluoride to NaCl-CsCl, after mixing thoroughly, add 0.1g of tungsten carbide.

[0023] (2) Growth of aluminum-graphene.

[0024] Put an aluminum sheet with a diameter of 3cm and a height of 1cm containing 0.65% (weight) impurities (0.62% silicon, 0.03% zinc) at the bottom of the alumina crucible, and place the mixture prepared in (1) on top of the aluminum sheet , cover the crucible lid, put it in a vertical heating furnace, heat up to the calcination temperature of 800 ℃ under normal pressure, and the calcination time is 1.5h. After the high temperature calcination is completed, pour the liquid mixture in the crucible into another In an alumina crucible, cool at room temperature for 2 hours. After the molten salt mixture is fully solidified, dissolve it in a sodium chloride solution with a mass fraction of 20%, and obtain a solid mixture after filtration. Slowly shake the solid mixture with tweezer...

Embodiment 2

[0026] According to the preparation method in Example 1, the difference is that the added carbide is 0.1 g titanium carbide, the alkali metal chloride is KCl, the calcination temperature is 750° C., the calcination time is 3 h, and the cooling time is 1.5 h. The hardness, strength and ductility of the prepared aluminum-graphene composite were tested, which were about 1.31 times that of pure aluminum metal materials.

Embodiment 3

[0028] According to the preparation method in Example 1, the difference is that the added carbide is 0.1g silicon carbide, the alkali metal chloride is KCl-AgCl, the calcination temperature is 700°C, the calcination time is 5h, and the cooling time is 2h. The hardness, strength and ductility of the prepared aluminum-graphene composite were tested, which were about 1.42 times that of pure aluminum metal materials.

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Abstract

The invention discloses a preparation method for an aluminum-graphene metallic composite. According to the method, (1) fluorides are added into alkali chlorides, even mixing is conducted, and then metallic or nonmetallic carbide powder is added; (2) an aluminum sheet is placed in an alumina crucible, a mixture in the step (1) is placed on the aluminum sheet, the alumina crucible is covered up and placed in a vertical heating furnace, the temperature is increased to 700-800 DEG C under the ordinary pressure, and roasting is conducted for 0.5-5 h; and (3) a liquid mixture formed in the step (2) is poured into the crucible and cooled for 1-2 h at the room temperature, after the liquid mixture is solidified, a sufficient quantity of sodium chloride solutions are added, a solid mixture is left after filtering, the aluminum sheet in the solid mixture is slowly grabbed out and placed on cover glass through a tweezer, the aluminum sheet is placed in deionized water, after water is changed for three times, drying is conducted, and the aluminum-graphene metallic composite is obtained. The technique is simple, capable of saving energy and low in cost; and the hardness, strength and ductility of the prepared aluminum-graphene composite are at least two to three times higher than those of pure aluminum materials.

Description

technical field [0001] The invention belongs to the field of functional materials. It relates to aluminum-graphene and a preparation method thereof. Background technique [0002] In recent years, carbonaceous nanomaterials including graphene and carbon nanotubes have become important reinforcements for new structural and functional materials due to their high thermal conductivity, high damping capacity, high elastic modulus, high mechanical strength, and good self-lubricating properties. . Synthesis of new lightweight metal composites with high electrical conductivity and stiffness is one of the most important goals of modern materials science. One of the directions is to prepare high-content nano- or micro-carbon-reinforced aluminum composites. Aluminum matrix composites have the advantages of low density, strong corrosion resistance, excellent electrical and thermal conductivity, and good processability, which has become the mainstream of current metal matrix composites...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C21/00
CPCC22C1/1036C22C21/00C22C1/1052
Inventor 戴贵平严小玲蒋邦邦曾哲灵邓曙光
Owner NANCHANG UNIV
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