WS2基固体润滑涂层摩擦性能研究

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The tribological properties of WS2 matrix solid lubricating coating were investigated by friction and wear tests. The results show that, under normal temperature, the tribological coefficient of WS2 matrix solid lubricating coatings are close to that of MoS2 matrix solid lubricating coating, however, the coating quality of WS2 metal matrix is inferior to that of MoS2 ; under high temperature, WS2 matrix coatings have stable friction coefficient, the tribological properties of WS2 coatings are superior to MoS2 matrix solid lubricating coatings. The composite coatings including MoS2 , WS2 and Sb2 03 can play a better role in friction reducing and lubrication, and the friction coefficient can reach to 0. 045 under high tempera- ture of 400 ℃. For the composite coatings including MoS2, WS2 and Sb2 03 , Sb2 03 reacts preferentially with the oxygen in the air under high temperature, which slows down the oxidation rate of MoS2 and WS2, and elevates the temperature that MoS2 and WS2 can withstand. In the condition of boundary lubrication, the mixed films of FeS and MoS2 are generated by the electrochemical catalysis and heat friction chemical reaction of MoS2, which improves the boundary lubrication.通过摩擦磨损试验，研究WS：固体润滑剂的摩擦性能。结果表明：常温工况下，WS2固体润滑剂的摩擦因数与MoS2的相近，但WS2涂层在金属基上成膜状态不如MoS2涂层；高温工况下，WS2基涂层摩擦因数稳定，摩擦性能优于MoS2基固体润滑涂层；在400℃的温度条件下，WS2、MoS2、Sb2O3复合涂层摩擦因数可达0．045，减摩润滑作用显著提高。在高温工况下，WS2、MoS2、Sb2O3复合涂层中Sb：0，优先与空气中的氧发生反应从而减缓MoS2、WS2的氧化速度，提高MoS2、WS2所能承受的温度；在边界润滑条件下，MoS。发生电化学催化和热摩擦化学反应，生成Fes和MoS2混合膜，改善了边界润滑。