Method for preparing grapheme reinforced aluminum matrix composite material

A technology for strengthening aluminum-based and composite materials, which is applied in the field of preparing graphene-reinforced aluminum-based composite materials, can solve problems such as easy agglomeration and poor graphene dispersibility, achieve uniform dispersion, improve tensile strength, and prevent graphene agglomeration phenomenon. Effect

Inactive Publication Date: 2015-11-25
HARBIN UNIV OF SCI & TECH
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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 solve the technical problems of poor graphene dispersion and easy agglomeration in the existing preparation of graphene-reinforced aluminum-matrix composites, and provide a method for preparing graphene-reinforced aluminum-matrix composites

Method used

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  • Method for preparing grapheme reinforced aluminum matrix composite material
  • Method for preparing grapheme reinforced aluminum matrix composite material
  • Method for preparing grapheme reinforced aluminum matrix composite material

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specific Embodiment approach 1

[0026] Specific embodiment one: this embodiment is a kind of method for preparing graphene-reinforced aluminum-based composite material, specifically according to the following steps:

[0027] 1. Preparation of graphene oxide: add 1g of graphite powder and 1g of sodium nitrate to the Erlenmeyer flask containing 46mL of concentrated sulfuric acid under the condition of ice-water bath, mix and stir for 20min under the condition of ice-water bath; Add 6g of potassium permanganate and stir for 40 minutes to obtain a green-purple mixed solution. Keep the green-purple mixed solution at a temperature of 30°C to 40°C for 1 hour, and then add it at a temperature of 30°C to 40°C. Incubate 40mL of distilled water at a temperature of 85°C to 95°C for 30 minutes to obtain a brown mixed solution. Add 100mL of distilled water and 6mL of hydrogen peroxide to the brown mixed solution at room temperature to obtain a bright yellow mixed solution. Then repeatedly wash the bright yellow mixed solu...

specific Embodiment approach 2

[0031] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass concentration of the concentrated sulfuric acid described in step one is 98%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0032]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the weight of the aluminum powder described in step 2 to the CTAB solution with a mass fraction of 1% is 1g:1mL. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing a grapheme reinforced aluminum matrix composite material. The method aims at solving the technical problems that in an existing method for preparing the grapheme reinforced aluminum matrix composite material, the grapheme dispersibility is poor, and agglomeration is prone to happening. The method includes the steps that (1) oxidized grapheme is prepared; (2) surface modification on aluminum powder is carried out; (3) oxidized grapheme-aluminum composite powder is prepared; and (4) the grapheme reinforced aluminum matrix composite material is prepared. An electrostatic self-assembly method is adopted in the method, so that graphene is evenly dispersed in an aluminum matrix to enable the graphene to be more evenly dispersed, phenomena of damage to graphene size and work hardening generated on the aluminum matrix during ball-milling treatment are avoided, and graphene agglomeration is prevented; in addition, the mechanical property of the composite material is obviously improved; and compared with a pure aluminum material, the strength of extension is improved by 10%-20%, and the hardness is improved by 10%-30%.

Description

technical field [0001] The invention relates to a method for preparing a graphene-reinforced aluminum-based composite material. Background technique [0002] Aluminum matrix composites have the advantages of low density, strong corrosion resistance, excellent electrical and thermal conductivity, and good processing performance, so they have become the mainstream of current metal matrix composites research. With the development of the automotive and aerospace fields, especially in harsh environments such as space and ionizing radiation, the specific strength, specific modulus, corrosion resistance, electrical and thermal conductivity of metal matrix composites are required to be higher. Traditional ceramics Fiber and granular reinforcements have been unable to meet the material requirements. [0003] Carbonaceous materials (carbon fiber, graphite and carbon nanotubes, etc.) have high electrical and thermal conductivity and good mechanical properties, and are ideal reinforcem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/14C22C1/10C22C21/00C01B31/04
Inventor 岳红彦高鑫郭二军陈宏涛姚龙辉林轩宇张虹俞泽民
Owner HARBIN UNIV OF SCI & TECH
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