【摘要】 采用OptimalSRV型微动摩擦磨损试验机评价了氟代二酮作为润滑油及其添加剂的摩擦学性能,并通过钢盘磨损表面的X射线光电子能谱和扫描电子显微镜分析探讨了氟代二酮的减摩抗磨作用机理.结果表明,氟代二酮的摩擦学性能受其化学结构和试验载荷的影响;烷基芳基二酮的抗磨效果最好;摩擦过程中氟代二酮在摩擦副表面发生了摩擦化学反应,形成了由化学反应膜和吸附膜构成的边界润滑膜,从而起到减摩抗磨作用.更多还原

【Abstract】 The frictionreducing and antiwear behaviors of several fluorinated diones as lubricants of a steelonsteel frictional pair were comparatively evaluated with that of 2,4pentanedione on an Optimol SRV oscillating friction and wear tester in a ballondisc configuration. The action mechanism of the lubricants was explored based on the observation and analysis of the morphologies and elemental distributions of the worn steel surfaces with a scanning electron microscope equipped with an energy dispersive spectrometer attachment and the analysis of the chemical states of the worn surfaces on an Xray photoelectron spectroscope. The correlation between the chemical structure and the frictionreducing and antiwear behaviors of the fluorinated diones as lubricants was discussed, while the load dependence of the frictionreducing and antiwear behavior of the fluorinated diones as lubricants was examined as well. The results showed that fluorinated alkaryl dione had better antiwear ability than fluorinated alkyl dione. Tribochemical reaction was involved in the sliding of steelagainststeel lubricated by the fluorinated diones, with the generation of a surfaceprotective layer composed of inorganic fluoride FeF2, which together with the adsorbed film of the lubricant contributed to improve the frictionreducing and antiwear behavior of the fluorinated diones as lubricants. However, the corrosiveness of the fluorinated diones was ineligible. In other words, the fluorinated diones of excessive corrosiveness was harmful to the frictionreducing and antiwear ability owing to increased corrosion to the sliding surfaces of the steelonsteel frictional pair.更多还原