目的 研究白云母/ CeO2 复合粉体在 500SN 基础油中的抗磨减摩性能和抗磨减摩机理。 方法以白云母、硝酸铈、草酸为原料,通过球磨固相法制备不同配比的白云母/ CeO2 复合粉体,用油酸改性,采用 XRD,SEM 等对粉体的结构特征和表面形貌进行表征,并通过四球磨损实验考察不同油样的摩擦学性能。 结果 添加了白云母/ CeO2 和单一白云母的润滑油,摩擦学性能均比无添加的基础油优越。 其中,添加了白云母/10% CeO2 复合粉体的润滑油抗磨减摩性能最好,摩擦系数比基础油降低了 10. 7% ,磨斑直径比基础油减少了 24. 4% 。 结论 白云母/ CeO2 复合粉体有较好的抗磨减摩能力,对磨损表面有修复作用,合理配比的白云母/ CeO2 能有效提高基础油的抗磨减摩性能。

Objective To research anti-friction and anti-wear properties of the muscovite/ CeO2 compound powder in the 500SN base oil. Methods The muscovite/ CeO2 compound powders of different ratios were prepared from muscovite, Ce(NO3)2 ·6H2O and C2H2O4·2H2O by the solid state reaction method. The compound powder was modified by oleic acid. XRD and SEM were used to study the structural features and surface morphology of muscovite/ CeO2 compound particles. The tribological properties of the prepared lubricating oil added with the powders were tested by the wear experiment. Results The oil that was added with muscovite/ CeO2 compound particles or simple muscovite powders had better anti-wear and anti-friction performance than the base oil; and the best performance was seen in the lubricating oil with muscovite/10% CeO2 compound powders, whose friction coefficient was reduced by 10. 7% and the wear scar diameter was reduced by 24. 4% compared to the base oil. Conclusion Muscovite/ CeO2 compound powder has good anti-friction and anti-wear ability, which can repair the worn surface. Muscovite/ CeO2 of reasonable ratio can improve the anti-friction and anti-wear properties of base oil effectively.