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为了解决石墨烯在铜基体中分散不均匀的问题,采用电荷吸引的方法将带负电荷的氧化石墨烯纳米片均匀的吸附在带正电荷的铜粉的表面,然后用粉末冶金的方法制备石墨烯增强铜基复合材料。采用扫描电镜,透射电镜,拉伸和导热测试等对石墨烯增强铜基复合材料的显微结构,力学性能和导热性能进行了研究。结果表明:石墨烯均匀的分散在铜基复合材料中,石墨烯在基体中的均匀分散和紧密的界面结合有效的提高了复合材料的性能。
In order to solve the problem of uneven dispersion of graphene in a copper matrix, negatively charged graphene oxide nanosheets were uniformly adsorbed on the surface of the positively charged copper powder by the method of charge attraction, and then graphite was prepared by powder metallurgy Reinforced copper matrix composites. The microstructure, mechanical properties and thermal conductivity of graphene reinforced copper matrix composites were investigated by scanning electron microscopy, transmission electron microscopy, tensile and thermal conductivity tests. The results show that graphene is uniformly dispersed in Cu-based composites. The uniform dispersion of graphene in the matrix and the close interfacial bonding effectively improve the properties of the composites.