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本文中系统研究了类金刚石(Diamond-like carbon,简称DLC)固体润滑薄膜与一系列不同黏度的烷烃、醇类液体润滑介质的复合润滑性能,并深入探讨了介质黏度、极性及摩擦配副在固液复合设计中的影响规律.我们发现所用DLC薄膜在所考察润滑介质中均表现出较好的稳定性及亲和性,而摩擦行为则呈现较大的差异:在非极性烷烃化合物润滑环境下,DLC/DLC和钢/钢摩擦副的摩擦系数随介质黏度的增加改变不大,钢/DLC摩擦副的摩擦系数则随着介质黏度的升高而逐渐降低;在极性的醇类介质中,钢/钢摩擦副的摩擦系数随着介质黏度的增大先下降后急剧上升,而钢/DLC和DLC/DLC摩擦副的摩擦系数随介质黏度的升高而降低.总之,介质黏度、极性和摩擦配副对体系润滑行为有很大影响,在进行固液复合润滑体系设计时,需综合考虑三者的相互作用关系.
In this paper, the complex lubrication properties of diamond-like carbon (DLC) solid lubricant films and a series of alkane and alcohol liquid lubricants with different viscosities were systematically studied. The viscosity, polarity and friction matching In the solid-liquid composite design.We found that the DLC films used in the study of the lubricating medium showed good stability and affinity, while the frictional behavior showed a significant difference: non-polar alkane compounds In the lubrication environment, the friction coefficient of DLC / DLC and steel / steel friction pair changed little with the increase of medium viscosity, while the friction coefficient of steel / DLC friction pair decreased with the increase of medium viscosity. In the medium, the friction coefficient of steel / steel friction pair decreases first and then increases sharply with the increase of medium viscosity, while the friction coefficient of steel / DLC and DLC / DLC friction pair decreases with the increase of medium viscosity.In short, The viscosity, polarity and friction pairs have great influence on the lubrication behavior of the system. When designing the solid-liquid composite lubrication system, the interaction between the three should be considered comprehensively.