论文部分内容阅读
将稀土化合物用作润滑油减摩抗磨添加剂是目前摩擦学研究的前沿课题之一。为了充分发挥我国稀土资源丰富这一优势，以稀土元素的摩擦学应用为出发点，对自行合成的油溶性二烷基二硫代磷酸铕的摩擦磨损性能进行了试验研究，同时还用扫描电子显微镜、Ｘ射线能谱仪、俄歇电子能谱仪和Ｘ射线光电子能谱仪进行了相应的摩擦化学研究，并与常用的二烷基二硫代磷酸锌的作了对比．结果表明，二烷基二硫代磷酸铕的减摩抗磨性能比二烷基二硫代磷酸锌的好，主要原因是其在摩擦过程中发生摩擦化学反应形成了由Ｅｕ２Ｏ３、ＦｅＳ、有机硫化物、硫酸盐和磷酸盐等组成的边界润滑膜，而且稀土元素铕在摩擦界面向钢基体渗透而改变了表层的裂纹扩展抗力和表面压应力，这也是二烷基二硫代磷酸铕呈现出良好减摩抗磨性能的重要原因．
It is one of the forefront topics in the field of tribology to use rare earth compounds as lubricating oil anti-friction and anti-wear additives. In order to give full play to the advantages of rare earth resources in our country, the friction and wear properties of oil-soluble europium dialkyldithiophosphate synthesized by ourselves were studied based on the tribological application of rare earth elements. Meanwhile, , X-ray energy dispersive spectroscopy, Auger electron spectroscopy and X-ray photoelectron spectroscopy were carried out corresponding tribochemical studies, and compared with the commonly used zinc dialkyl dithiophosphate. The results show that the antifriction and antiwear properties of europium dialkyldithiophosphate are better than that of zinc dialkyldithiophosphate. The main reason is that trivalent europium dialkyldithiophosphate , Sulfate, and phosphate, and the rare earth element europium infiltrates the steel matrix at the friction interface and changes the crack propagation resistance and the surface compressive stress of the surface layer, which is also the result that europium dialkyldithiophosphate Good anti-friction and wear an important factor.