(南昌航空大學(xué) 材料科學(xué)與工程學(xué)院，南昌 330063)
摘 要: 采用熱還原法和放電等離子燒結(jié)技術(shù)制備石墨烯納米片/銅(rGO/Cu)復(fù)合材料，研究不同含量的還原氧化石墨烯(rGO)對制備復(fù)合材料的影響。結(jié)果表明：氧化石墨烯在銅粉表面均勻分散。在燒結(jié)后，rGO與銅粉緊密結(jié)合在一起，形成良好的結(jié)合界面。隨著rGO含量的增加，復(fù)合材料的維氏硬度和電導(dǎo)率先增加后降低。rGO含量(質(zhì)量分?jǐn)?shù))為0.1%時，rGO/Cu復(fù)合材料硬度有最高值112.7HV；rGO含量為0.25%時，復(fù)合材料電導(dǎo)率有最高值56.5 MS/m。rGO/Cu復(fù)合材料摩擦性能隨著rGO含量的增加而降低，rGO含量達到0.5%時，復(fù)合材料的摩擦因數(shù)最低為0.402。
關(guān)鍵字: 熱還原法；氧化石墨烯；復(fù)合材料；電導(dǎo)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
