A method of preparing a high-performance graphene reinforced aluminium-based composite material

A technology for strengthening aluminum-based and composite materials, applied in the field of materials science, can solve the problems of poor graphene dispersion and interface reactions, and achieve the effects of avoiding agglomeration, improving microhardness, and making significant technological progress.
CN106566942AActive Publication Date: 2017-04-19UNIV OF SHANGHAI FOR SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF SHANGHAI FOR SCI & TECH
Publication Date
2017-04-19

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Abstract

A method of preparing a graphene reinforced aluminium-based composite material is provided. The method includes a step of preparing graphene oxide; a step of performing surface modification on aluminum powder to prepare flake-like aluminum powder; a step of preparing graphene / aluminium hydroxide / aluminum multilayer clad structured powder, namely a step of mixing graphene and the aluminum powder, then adding the mixture into an alcohol solution, and performing ultrasonic treatment for 0.1-1 h at 30-50 DEG C to obtain the graphene / aluminium hydroxide / aluminum multilayer clad structured powder; and a step of adding the prepared graphene / aluminium hydroxide / aluminum multilayer clad structured powder into a hot pressing sintering mold, applying a pressure of 100-200 MPa, protecting the powder with argon or nitrogen and performing hot pressing sintering to obtain the high-performance graphene reinforced aluminium-based composite material. The method effectively avoids graphene agglomeration and interface reactions between the graphene and aluminum. The microhardness of the composite material prepared by the method is increased by 30% or above.
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Description

technical field

[0001] The invention belongs to the field of materials science, and relates to an aluminum-based composite material, in particular to a method for preparing a high-performance graphene-reinforced aluminum-based composite material. Background technique

[0002] Due to its low density and stable performance, aluminum matrix composites are widely used in aerospace and high-end automobile manufacturing fields. Compared with traditional reinforcements (ceramic particles, carbon fibers, carbon nanotubes, etc.), graphene has the advantages of low density, high mechanical properties, good thermal conductivity, and low thermal expansion coefficient. Graphene has been considered as a very Promising Augmentation Body. The successful development of high-performance graphene-reinforced aluminum matrix composites can not only improve the performance of composite materials, but also reduce the density of composite materials.

[0003] In terms of the preparation methods of...

Claims

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