Uniform dispersion of graphene oxide in aluminum powder by direct electrostatic adsorption for fabrication of graphene/aluminum composites

The excellent properties of graphene promote it as an ideal reinforcement in composites. However, dispersing graphene homogenously into metals is a key challenge that limits the development of high-performance graphene-reinforced metal matrix composites. Here, via simple electrostatic interaction be...

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Bibliographic Details
Published in:Nanotechnology 2014-08, Vol.25 (32), p.325601-8
Main Authors: Li, Zan, Fan, Genlian, Tan, Zhanqiu, Guo, Qiang, Xiong, Dingbang, Su, Yishi, Li, Zhiqiang, Zhang, Di
Format: Article
Language:English
Subjects:
Adsorption
Aluminum
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
electrostatic interaction
Electrostatics
Exact sciences and technology
Flakes
Fullerenes and related materials
diamonds, graphite
Graphene
Hot pressing
Materials science
Mechanical and acoustical properties of condensed matter
Mechanical properties of nanoscale materials
metal matrix composites
Oxides
Physics
Reinforcement
Solid surfaces and solid-solid interfaces
Specific materials
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
uniform dispersion
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Summary:The excellent properties of graphene promote it as an ideal reinforcement in composites. However, dispersing graphene homogenously into metals is a key challenge that limits the development of high-performance graphene-reinforced metal matrix composites. Here, via simple electrostatic interaction between graphene oxide (GO) and Al flakes, uniform distribution of reduced graphene oxide (RGO) in an Al matrix is achieved. The adsorption process of GO on Al flakes is efficient, as it can be completed in minutes and proceeds spontaneously without any chemical agents. GO can be partially reduced by the electron interchange during the adsorption process and could be thoroughly reduced after subsequent thermal annealing. A densified RGO/Al composite can be obtained by hot pressing the RGO/Al composite powders. By employing the preceding fabrication process, a composite reinforced with only 0.3 wt.% of RGO shows an 18 and 17% increase in elastic modulus and hardness, respectively, over unreinforced Al, demonstrating RGO is a better reinforcement than most other reinforcements.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/25/32/325601