纳米WS2润滑油添加剂在直流磁场下的摩擦磨损特性

在四球摩擦磨损实验机摩擦区域添加了直流磁场发生装置,研究了添加经修饰的纳米WS₂润滑油在直流磁场作用下的摩擦磨损性能,用扫描电镜（SEM）配合能谱仪（EDS）及X射线光电子能谱仪（XPS）对钢球磨斑区域表面形貌和典型元素的含量及化学状态进行了分析,并探讨了相关的摩擦学机理。实验结果表明：经修饰后的纳米WS₂在150SN基础油中稳定性良好,含纳米WS₂的润滑油体现出更好的润滑性能,在纳米WS₂含量相同时,直流磁场下的润滑油抗磨减摩效果更好。直流磁场对纳米WS₂有一定的聚集效应,并会提高摩擦化学反应发生的概率。

Tribological properties ofnano-WS2 lubricating oil additives under DC magnetic field

A DC magnetic field generator was assembled around the friction region in a four-ball tester. The tribological properties of 150SN base oil and lubricating oil containing modified nano-WS₂ under and without DC magnetic field were studied by modified tribo-tester. The morphology, the content and chemical species of typical elements on the worn surfaces lubricated with the tested oil were examined by SEM-EDS and XPS, and then the tribological mechanism was discussed. The results indicate that the modified nano-WS₂ has good stability in 150SN base oil. The lubricating oil containing nano-WS₂ exhibits better lubrication performance. In addition, when the nano-WS₂ content is the same, the anti-wear and friction reduction effect of the lubricating oil under DC magnetic field is better. The DC magnetic field had a certain aggregation effect on nano-WS₂ and could increase the possibility of tribochemical reaction.