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首页> 外文期刊>Nanotechnology >Uniform dispersion of graphene oxide in aluminum powder by direct electrostatic adsorption for fabrication of graphene/ aluminum composites
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Uniform dispersion of graphene oxide in aluminum powder by direct electrostatic adsorption for fabrication of graphene/ aluminum composites

机译：通过直接静电吸附将氧化石墨烯均匀分散在铝粉中，用于制造石墨烯/铝复合材料

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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.
机译：石墨烯的优异性能使其成为复合材料的理想增强材料。然而，将石墨烯均匀地分散到金属中是一个关键的挑战，这限制了高性能石墨烯增强金属基复合材料的发展。在此，通过氧化石墨烯（GO）和Al薄片之间的简单静电相互作用，可以实现Al基体中还原氧化石墨烯（RGO）的均匀分布。 GO在Al薄片上的吸附过程是有效的，因为它可以在数分钟内完成，并且无需任何化学试剂即可自发进行。 GO可以在吸附过程中通过电子交换部分还原，并且可以在随后的热退火后彻底还原。可以通过热压RGO / Al复合粉末获得致密的RGO / Al复合材料。通过采用前面的制造工艺，仅含0.3％（重量）RGO的复合材料的弹性模量和硬度分别比未增强的Al分别提高18％和17％，这表明RGO比大多数其他增强材料更好。

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