油酸表面修饰PbO纳米微粒作为润滑油添加剂的摩擦学性能研究

利用四球摩擦磨损试验机考察了油酸修饰PbO纳米微粒作为润滑油添加剂的摩擦学行为，并用X射线光电子能谱仪（XPS）、扫描电子显微镜（SEM）和能量散射谱仪（EDS）等现代分析工具对钢球磨损表面进行了分析，摩擦磨损试验结果表明，油酸修饰PbO纳米微粒作为润滑油添加剂能够明显提高基础油的减摩抗磨能力，当添加质量分数为0.30%时，与基础油相比可以使摩擦系数和钢球磨厂主 直径降低30%左右。XPS、SEM及EDS分析结果表明，钢球表面在摩擦过程中形成了一层富含PbO的边界润滑膜，这使得油酸修饰PbO纳米微粒作为润滑油添加剂表现出良好的摩擦学性能。

Tribological Behavior of Oleic Acid Coated PbO Nanoparticles as Additive in Liquid Paraffin

A four ball machine was used to investigate the tribological behavior of oleic acid (OA) coated PbO nanoparticles as additive in liquid paraffin. A comparative investigation was also carried out on the same tester with respect to lead oleate as an additive in liquid paraffin. The worn surfaces of the steel balls were analyzed by means of X ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS). As the results, OA coated PbO nanoparticles as additive effectively increases the friction reduction and antiwear ability of liquid paraffin. It shows better friction reduction and antiwear performance than lead oleate as well. The analytical results of XPS, SEM and EDS indicate that a boundary film mainly composed of PbO is formed on the steel ball surface under the lubrication of liquid paraffin containing OA coated PbO nanoparticles. This contributes to improve the friction reduction and antiwear behavior of the base stock.