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 C2 H2 O4 ·2H2 O 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 mus-covite/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 ra-tio can improve the anti-friction and anti-wear properties of base oil effectively.
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