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通过超细研磨的方法制备了1种复合矿物微粉,采用RFT-Ⅲ型往复摩擦试验机评价了其作为润滑油添加剂对钢摩擦副的自修复效应,借助扫描电子显微镜(SEM)、能量色散谱仪(EDS)及纳米压痕仪(Nano indenter)对磨损表面及截面进行了表征,探讨了其减摩抗磨机理.结果表明:矿物微粉作为润滑油添加剂具有良好的减摩抗磨及自修复性能.其摩擦系数较基础油降低约55.1%,上下试样的磨损率相应地降低了85.7%和97.6%.添加剂与摩擦表面发生了复杂的理化作用,诱发形成了较为连续均匀的多孔氧化膜自修复层,其表面较为光滑平整,厚度约为0.72μm,主要由Fe、C和O元素构成,具有较高的微观力学性能,有效地降低了摩擦副的摩擦磨损.
A kind of composite mineral powder was prepared by ultrafine grinding method. The self-healing effect of the compound on friction pair of steel was evaluated by RFT-Ⅲ reciprocating friction tester. Scanning electron microscopy (SEM), energy dispersive spectrum EDS and Nano indenter were used to characterize the wear surface and cross-section, and the anti-friction and anti-wear mechanism was discussed. The results show that the mineral micro-powder has a good anti-wear and self- The coefficient of friction is reduced by about 55.1% compared with the base oil, and the wear rates of the upper and lower samples are reduced by 85.7% and 97.6% respectively. The additive and the frictional surface undergo complicated physical and chemical actions, inducing the formation of a more continuous and uniform porous oxide film Self-repairing layer, the surface is relatively smooth, the thickness of about 0.72μm, mainly composed of Fe, C and O elements, with high micro-mechanical properties, effectively reducing the friction pair friction wear.