离子液体润滑下的GLC薄膜摩擦学性能研究

Study on Tribological Properties of GLC Films Lubricated by Ionic Liquids

合成了一系列新型锂基离子液体,利用磁控溅射技术在单晶硅表面制备了类石墨碳薄膜摩擦副,利用UMT-2MT摩擦磨损试验机以离子液体作为润滑剂对类石墨碳薄膜的摩擦性能进行了研究.采用扫描电子显微镜(SEM)分析了薄膜表面磨损的微观形貌,通过X射线光电子能谱仪(XPS)分析了薄膜摩擦磨损机理.结果表明锂盐离子液体与咪唑基离子液体相比,锂基离子液体表现出了优秀的抗磨性能,咪唑基离子液体展现了更优良的减摩性能,其原因是由于摩擦副表面生成了包括摩擦化学反应膜和物理吸附膜的边界润滑保护膜,起到了抗磨减摩的作用.

A series of new lithium based ionic liquids are synthesized.The friction pairs of the graphitelike carbon（GLC）films are prepared by magnetron sputtering technology on the surface of monocrystalline silicon.The friction properties of GLC films are studied with ionic liquid as lubricant by the UMT-2 MT friction and wear tester.The microstructure of the surface wear of the film is analyzed by scanning electron microscope（SEM）and the friction and wear mechanism of the film is analyzed by the X ray photoelectron spectroscopy（XPS）.The results show that lithium ionic liquids exhibit excellent anti-wear properties while imidazolyl ionic liquids exhibit better anti-friction properties.The reason is that the surface of the friction pair has formed a boundary lubrication protective film including the frictional chemical reaction film and physical adsorption film which plays a role in anti-wear and friction reduction of GLC films.