钛合金表面稀土改性双层羧基化石墨烯复合薄膜的摩擦磨损性能  

Frictional Wear Behavior of Rare Earth Treated Double-Layer Carboxylated Graphene Oxide Coatings on Titanium Alloy Substrate

作　　者：李鹏飞[1] 周华[1,2] 程先华[1,3] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]上海师范大学机电信息学院,上海201418 [3]清华大学摩擦学国家重点实验室,北京100084

出　　处：《上海交通大学学报》2015年第10期1522-1526,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(51175330)资助

摘　　要：利用自组装成膜技术在钛合金基片表面制备了稀土改性双层羧基化石墨烯复合薄膜,采用接触角测量仪测量薄膜表面的接触角,采用扫描电子显微镜观察薄膜表面的微观形貌,并利用UMT-2MT型摩擦磨损试验机及原子力显微镜研究薄膜的宏观及微观摩擦磨损性能.结果表明:所制备的稀土离子改性双层羧基化石墨烯复合薄膜具有优异的摩擦磨损性能;相比于单层薄膜,稀土改性双层羧基化石墨烯复合薄膜具有更低的摩擦系数和微观摩擦力,表现出更优异的宏观及微观摩擦磨损性能.Rare earth（RE）treated double-layer carboxylated graphene oxide（CGO）coatings were prepared by a self-assembly process.The water contact angles of the self-assembled coatings were measured to compare the surface wettability.Micro-morphology tests were conducted to study the morphology of the double layer coating.The UMT-2MT reciprocating frictional wear tester and atomic force microscope were applied to test the macro and nano friction and wear properties.The results show that double-layer CGO coating is successfully obtained by making agood use of RE which has a strong absorbing capacity of the CGO material.Moreover,RE can reduce the surface energy of the double-layer CGO coating,and improve the frictional wear behaviors of the coating.Compared with RE treated single-layer CGO coating,the double-layer coating holds lower friction coefficient and nano friction force,which make it a better antifriction and antiwear coating in both macro and nao scale frictional wear tests.

关 键 词：钛合金 稀土 羧基化 石墨烯 自组装薄膜 摩擦磨损性能 

分 类 号：TH117.1[机械工程—机械设计及理论]