烟炱对有机钼减摩剂摩擦学性能的影响

在SRV-IV摩擦磨损试验机上，采用球-盘点接触方式，考察了烟炱含量对有机钼减摩剂M2摩擦学性能的影响，同时考察了温度和载荷对M2在含烟炱柴油机油中减摩效果的影响，借助扫描电子显微镜及能谱仪(SEM/EDS)、X射线光电子能谱仪(XPS)探讨了烟炱对有机钼减摩剂M2摩擦学性能影响的机理。结果表明，M2在高烟炱含量的柴油机油中可以起到一定抗磨作用，M2在含烟炱柴油机油中的减摩性能随烟炱含量的上升而下降，温度或载荷的升高能使M2在含烟炱柴油机油中失去减摩效果。分析认为，烟炱参与了M2磨痕表面反应膜的形成，生成了含Mo—C类物质，随着该类物质含量的增多，M2在含烟炱油样中的减摩效果越来越弱，直至失效。

Effects of Diesel Soot on the Tribology Behavior of Organo-Molybdenum Friction Modifier

The effects of diesel soot contents on the tribology behavior of organic molybdenum friction modifier M2 were investigated by means of the ball-on-disk mode on a SRV IV friction and wear tester. The effects of temperature and load on the friction reduction of M2 in soot-containing diesel engine oil were also investigated. Finally, the mechanism of the effects of soot on the tribology behavior of organic molybdenum friction modifier M2 was investigated by means of scanning electron microscopy and energy-dispersive spectroscopy (SEM/EDS) and X-ray photoelectron spectroscopy (XPS). Results show that the friction reduction performance of M2 in soot-containing diesel engine oil decreases with the increase of soot content, and M2 still anti-wear properties in a diesel oil with high soot contents. The increase in temperature or load could cause M2 to lose friction reducing ability. According to the analysis, the soot participates in the formation of the reaction film on the surface of M2 wear scar, and Mo—C-containing substances are formed. With the increase of such substances, the anti-friction performance of M2 becomes weaker until it fails.