2易于氧化生成WO3，導致WS2固體潤滑薄膜的摩擦學性能受到較大影響。為改善WS2固體潤滑薄膜在高溫條件下的摩擦學性能，采用非平衡磁控濺射技術(shù)制備了共摻雜La-Ti/WS2復合薄膜，研究了靶功率對磁控濺射La-Ti/WS2復合薄膜結(jié)構(gòu)和高溫摩擦學性能的影響。利用掃描電鏡（SEM）、X射線衍射儀（XRD）、納米壓痕儀和X射線光電子能譜儀（XPS）分析了薄膜微觀形貌、成分、力學性能、微觀結(jié)構(gòu)。利用高溫摩擦磨損試驗機研究了復合薄膜的高溫摩擦學性能。結(jié)果表明，高溫環(huán)境下，靶功率為20 W時La-Ti/WS2復合薄膜表現(xiàn)出優(yōu)異的摩擦學性能。此時，復合薄膜H/E值最大，摩擦系數(shù)最小，平均為0.012，磨損率最低為1.56×10-8 mm3/N·m，這主要歸因于高溫下摩擦界面產(chǎn)生的稀土氧化物，促使La-Ti/WS2復合薄膜的摩擦磨損機制發(fā)生了改變，使得WS2在高溫受破壞的情況下仍然具有優(yōu)異的摩擦學性能，從而進一步拓展了WS2復合薄膜的工程應(yīng)用范圍。;Under high temperature conditions, the crystal WS2 is easily oxidized to WO3, which has a great impact on the tribological properties of WS2 solid lubrication films. In order to improve the tribological properties of WS2 solid lubricating films at high temperatures, the co-doped La-Ti/WS2 composite films were prepared by unbalanced magnetron sputtering. The effects of target power on the structure and tribological properties of La-Ti/WS2 composite films were studied. The micromorphology, composition, mechanical properties and microstructure of the films were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), nano indentation and X-ray photoelectron spectroscopy (XPS). The high temperature tribological properties of composite films were researched by high temperature friction tester. The results show that La-Ti/WS2 composite films show excellent tribological properties when the target power is 20 W at high temperature. At this time, the H/E value of the composite film is the largest, the friction coefficient is the smallest with the average value of 0.012, and the wear rate is the lowest, which is 1.56×10-8 mm3/N·m. This is mainly due to the production of rare earth oxides at the friction interface at high temperatures, which change the friction and wear mechanism of La-Ti/WS2 composite film, so that WS2 still has excellent tribological properties when it is damaged at high temperature, further expanding the scope of engineering application of WS2 composite films."/>
2薄膜;rare earth;high temperature;friction;WS2 composite films"/>