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Graphene reinforced aluminum matrix composite material and preparation method

A composite material and aluminum-based technology, applied in the field of composite materials, can solve the problems of poor graphene dispersion, low strengthening efficiency, poor interface bonding, etc., and achieve the effect of complete graphene structure, avoiding interface reaction and excellent material performance.

Active Publication Date: 2018-10-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the defects in the prior art, the object of the present invention is to solve the poor dispersion of graphene in the graphene-enhanced aluminum-matrix composite material, which is prone to interfacial reactions, poor interfacial bonding between graphene and the metal matrix, and the graphene-enhanced aluminum-matrix composite material process. Complicated technical problems, while solving the problems of irregular distribution of graphene in composite materials and low strengthening efficiency, providing a new graphene-reinforced aluminum-based composite material with semi-solid structure characteristics and regular distribution of graphene and its preparation method

Method used

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  • Graphene reinforced aluminum matrix composite material and preparation method
  • Graphene reinforced aluminum matrix composite material and preparation method
  • Graphene reinforced aluminum matrix composite material and preparation method

Examples

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Embodiment 1

[0034] This embodiment is a graphene-reinforced aluminum-based composite material and its preparation method. The preparation steps are as follows:

[0035] 1) Get 5g graphene and ultrasonically disperse in ethanol solution, carry out metal nickel-plating treatment to it in advance after freeze-drying; Prepared nickel-plated graphene is as attached figure 1 , the graphene is uniformly covered by the surface nickel layer.

[0036] 2) Take 100g of industrial pure aluminum powder, the aluminum particle size is 80-120μm, ball mill it with nickel-plated graphene for 12h, and add 0.01g of stearic acid as a surfactant. The prepared mixed powder is as attached figure 2 , nickel-coated graphene is uniformly attached to the surface of aluminum-based powder.

[0037] 3) Put 400g of Al5wt.% Cu into the alumina crucible and heat until it melts, put the ultrasonic probe deep into the liquid surface and turn on the ultrasonic, mix the fine powder and send it into the melt with an external...

Embodiment 2

[0056] 1) Get 1g of graphene and ultrasonically disperse in ethanol solution, freeze-dry and carry out metal nickel plating to it in advance;

[0057] 2) Take 100g of industrial pure aluminum powder, the aluminum particle size is 80-120μm, and ball mill it with the nickel-plated graphene under the protection of argon for 24h, and add 0.01g of stearic acid as a surfactant;

[0058] 3) Put 400g of Al5wt.% Cu alloy into an alumina crucible and heat until it melts. Put the ultrasonic probe deep into the liquid surface and turn on the ultrasonic. Graphene fine powder is sent into the melt from the center hole of the ultrasonic probe under argon flow, and then obtained by air cooling. 0.2wt.% graphene reinforced aluminum matrix composite. During this process, the nominal ultrasonic power is 2000W, the melt temperature is controlled at 680°C-550°C, the flow rate of the mixed powder is 1-2g / min; the ultrasonic probe is cylindrical, and its interface size is The size of the central c...

Embodiment 3

[0073] This embodiment relates to a method for preparing a graphene-reinforced aluminum-based composite material, and the specific steps are as follows:

[0074] 1) Get 5g graphene and ultrasonically disperse in ethanol solution, after freeze-drying, carry out metal copper-plating treatment to it in advance;

[0075] 2) Take 100g of high-purity aluminum powder with an aluminum particle size of 60-100 μm, ball mill it with Cu-plated graphene for 12 hours, and add 0.01g of stearic acid as a surfactant;

[0076] 3) Put 400g of Al20wt.% Cu alloy into an alumina crucible and heat until it melts. Put the ultrasonic probe deep into the liquid surface and turn on the ultrasonic, mix the fine powder and send it into the melt with an external delivery tube under argon flow, and then air-cool to obtain 1wt. .% graphene-reinforced Al-based composites. During this process, the nominal ultrasonic power is 2000W, the melt temperature is controlled at 660°C-550°C, the flow rate of the mixed ...

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Abstract

The invention provides a graphene reinforced aluminum matrix composite material and a preparation method. The preparation method comprises the following steps that S1, graphene is subjected to metal plating treatment; S2, the graphene after metal plating treatment and metal powder are subjected to ball-milling treatment, and a surfactant is added during the ball-milling process to obtain a uniformly-mixed mixture; and S3, the mixture is added into aluminum or aluminum alloy melt under the action of air flow and ultrasonic, the flow rate of the mixture and the temperature of the melt are controlled, and the graphene reinforced aluminum matrix composite material is obtained after cooling and solidifying. The graphene reinforced aluminum matrix composite material prepared by the preparation method has semi-solid structure characteristics, the graphene is relatively complete in structure, and the material performance is excellent. The tensile strength of the aluminum matrix composite material prepared by the preparation method is improved by 30%-70% compared with that of a matrix, and is improved by 10%-30% compared with a graphene reinforced aluminum matrix composite material with non-semi-solid structure characteristics.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a graphene-reinforced aluminum-based composite material and a preparation method thereof. Background technique [0002] Aluminum matrix composites have the advantages of low density, strong corrosion resistance, excellent electrical and thermal conductivity, etc., and have broad application prospects in the fields of aerospace and automobiles. Graphene has extremely high strength, which is the highest strength material known, and the aluminum-based composite materials using it as a reinforcing phase have attracted extensive attention. Existing graphene-reinforced aluminum matrix composite materials and their preparation methods mainly include powder metallurgy, casting and so on. However, these methods generally have problems such as poor dispersion of graphene in the aluminum matrix, and graphene is easily found and lost at high temperature with the matrix. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/03C22C21/12
CPCC22C1/1036C22C21/12C22C1/1047
Inventor 黄海军疏达孙宝德
Owner SHANGHAI JIAO TONG UNIV
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