在研究油溶性二烷基二硫代磷酸镧（简称ＬａＤＤＰ）和有机硼酸酯（简称ＯＢ）的润滑性能和润滑机理过程中，发现这两种添加剂具有优异的协合润滑作用，且在适宜的摩擦条件下，稀土元素Ｌａ可促进Ｂ元素的摩擦扩散，并形成Ｌａ－Ｂ摩擦共渗层。提出了稀土元素对有机硼酸酯具有“摩擦催化裂化”的催渗机制。ＬａＤＤＰ在亚表面生成的Ｌａ－Ｂ摩擦共渗层使材料硬度增加和耐磨性增强。 In the study of lubricity and lubrication mechanism of oil-soluble lanthanum dialkyl dithiophosphates (referred to as LaDDP) and organic boronic esters (referred to as OB), these two additives were found to have excellent synergistic lubrication, and in the appropriate Of the friction conditions, the rare earth element La can promote the friction element B diffusion, and the formation of La-B friction co-diffusion layer. The catalytic mechanism of rare earth elements on the “friction catalytic cracking” of organic boric esters was proposed. LaDDP generated in the subsurface La-B friction co-diffusion layer to increase the hardness and wear resistance of materials increased.