(南昌航空大学 材料科学与工程学院，南昌 330063)
摘 要: 采用热还原法和放电等离子烧结技术制备石墨烯纳米片/铜(rGO/Cu)复合材料，研究不同含量的还原氧化石墨烯(rGO)对制备复合材料的影响。结果表明：氧化石墨烯在铜粉表面均匀分散。在烧结后，rGO与铜粉紧密结合在一起，形成良好的结合界面。随着rGO含量的增加，复合材料的维氏硬度和电导率先增加后降低。rGO含量(质量分数)为0.1%时，rGO/Cu复合材料硬度有最高值112.7HV；rGO含量为0.25%时，复合材料电导率有最高值56.5 MS/m。rGO/Cu复合材料摩擦性能随着rGO含量的增加而降低，rGO含量达到0.5%时，复合材料的摩擦因数最低为0.402。
关键字: 热还原法；氧化石墨烯；复合材料；电导率；摩擦性能
（School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China）
Abstract:The thermal reduction method and spark plasma sintering technology were used to prepare graphene nanosheets/copper (rGO/Cu) composites, and the effect of different content of reduced graphene oxide (rGO) on the preparation of composites was studied. The results show that graphene oxide(GO) is uniformly dispersed on the surface of copper powder. After sintering, GO and copper powder are tightly combined to form a good bonding interface, and the hardness, electrical conductivity and friction properties of the composites are also improved respectively. With the increase of rGO content, the hardness and conductivity of the composites first increase and then decrease. When the rGO content is 0.1%, the hardness of rGO/Cu composites has the highest value of 112.7 HV, and when the rGO content is 0.25%, the composites conductivity has the highest value of 56.5 MS/m. The friction performance of composites decreases with the increase of rGO content. When the rGO content reaches 0.5%, the friction coefficient of the composites is at least 0.402.
Key words: thermal reduction method; graphene oxide; composites; electrical conductivity; friction performance
