(1. 東北大學(xué) 冶金學(xué)院，沈陽 110819；
2. 中國科學(xué)院 金屬研究所，沈陽 110015)
摘 要: 以化學(xué)鍍結(jié)合粉末冶金法制備石墨烯/銅基復(fù)合材料(Cu@rGO/Cu)。為了改善石墨烯(rGO)在銅基體中的分散性以及兩者之間的可潤濕程度，首先采用化學(xué)鍍工藝制備鍍銅石墨烯(Cu@rGO)，并通過SEM和XRD對鍍層形貌和物相組成進(jìn)行檢測分析。為了檢驗(yàn)Cu@rGO/Cu復(fù)合材料的摩擦性能，對Cu@rGO/Cu復(fù)合材料摩擦性質(zhì)進(jìn)行測試。結(jié)果表明：Cu@rGO表面均勻鍍覆一層銅并附著粒徑約為50 nm的納米銅顆粒，rGO的褶皺結(jié)構(gòu)以及化學(xué)鍍的預(yù)處理過程有利于納米銅顆粒長大。呈網(wǎng)狀結(jié)構(gòu)的鍍銅rGO可以很好的釋放掉因摩擦而產(chǎn)生的應(yīng)力集中，形成C—Cu力轉(zhuǎn)移體系，保護(hù)摩擦表面；同時(shí)散落在rGO表面的納米銅顆粒，在摩擦過程中類似于許多“滾動軸承”，有效地改善復(fù)合材料的摩擦性能。
關(guān)鍵字: 石墨烯；化學(xué)鍍；粉末冶金；摩擦性能
（1. School of Metallurgy, Northeastern University, Shenyang 110819, China;
2. Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China）
Abstract:Graphene/copper composites (Cu@rGO/Cu) were prepared by using powder metallurgy and eletroless plating. In order to improve the dispersibility and wettability of graphene (rGO) in the copper matrix, the copper-plated graphene (Cu@rGO) was fabricated by eletroless plating and characterized by SEM and XRD. Friction experiment of composite were proceeded in order to investigate the influence of the amount of Cu@rGO on the friction performance of composite. The results show that copper can be uniformly coated on the surface of rGO. The folding structure and electroless pretreatment of rGO are beneficial to promote the growth of nano-copper particles. The network structure of rGO can release the stress concentration on the copper substrate, a C—Cu force transfer system forms to protect the friction surface; in the fiction process, the nono-copper particles which scatter on the graphene surface are similar to the “rolling bearings”, effectively improve the friction properties of the composite.
Key words: graphene; electroless plating; powder metallurgy; friction performance
