抗磨添加剂ZDDP在聚α-烯烃基础油中摩擦学性能的研究  

Tribological Properties of Anti-Wear Additive ZDDP in Polyα-Olefin Base Oil

作　　者：裴孝虎 刘晓玲 陈加丽 郭峰 PEI Xiaohu;LIU Xiaoling;CHEN Jiali;GUO Feng(School of Mechanical&Automotive Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《摩擦学学报（中英文）》2024年第7期912-924,共13页Tribology

基　　金：国家自然科学基金项目(51475250);泰山学者人才工程项目(TS201909430)资助。

摘　　要：为了研究二烷基二硫代磷酸锌(ZDDP)在润滑剂中的抗磨机理以及润滑成膜能力,利用四球摩擦磨损试验机分析了ZDDP对聚α-烯烃(PAO10)基础油摩擦磨损性能的影响,采用电子显微镜(SEM)和能谱仪(EDS)对摩擦副磨斑表面形貌以及化学元素进行表征;利用原子力显微镜(AFM)对ZDDP热反应膜进行三维形貌扫描并测量其粗糙度,分析了热膜厚度与表面粗糙度之间的关系;采用球-盘点接触光干涉油膜厚度试验台,研究了ZDDP对PAO10润滑成膜性能的影响.结果显示,ZDDP在摩擦副表面形成的摩擦反应膜具有较好的抗磨性;摩擦膜的存在改变了接触区的形貌和磨斑表面粗糙度,对润滑剂卷吸到接触区产生了影响,表现出高摩擦特性;根据稳态下ZDDP热反应膜厚度与其表面粗糙度的关系,分析了摩擦膜中的摩擦化学作用机制.充分供油条件下,ZDDP形成的吸附膜对油膜厚度的影响不大,限量供油条件下,吸附膜的存在增加了接触区的油膜厚度,有效缓解了乏油状况.The anti-wear mechanism and film-forming ability of ZDDP in lubricants were studied.The functional groups of the PAO10 base oil and ZDDP were characterized by Fourier transform infrared spectroscopy(FTIR),respectively.The influence of ZDDP on the friction and wear properties of base oil was studied by four-ball friction testing machine.The diameter,morphology and surface chemical elements of the wear scars were analyzed by electron microscopy(SEM)and energy dispersive spectrometer(EDS).The 3D morphology of the wear scars were scanned by confocal laser microscope and the roughness was measured at the same time.The 3D morphology and roughness of ZDDP thermal films were measured by Atomic force microscopy(AFM),and the surface functional groups of the thermal films were analyzed by Raman spectroscopy.The influence of ZDDP on the film forming ability was studied by using the point contact ball-disc optical interference oil film thickness test device.The results of friction test showed that ZDDP exhibits high friction and low wear characteristics.At 23℃,the friction coefficient of ZDDP with 2%mass fraction was increased by 0.05 compared with base oil,and the diameter of wear scar was reduced by 110μm.At 40℃,the friction coefficients of ZDDP with different mass fractions changed little,but also higher than base oil.At 100℃,the friction coefficient increased further with the increase of temperature.In the friction and wear test,the high friction and low wear characteristics of ZDDP are caused by the formation of friction reaction film in the contact zone of ZDDP,which inhibited the entrainment of lubricant in the inlet zone into the contact zone.The results showed that the test temperature and the concentration of additives were important factors to improve the performance of ZDDP.The tribochemical mechanism was explained according to the relationship between the thickness of thermal reaction film and the surface roughness under steady state.Atomic force microscopy(AFM)results showed that ZDDP thermal film was a d

关 键 词：二烷基二硫代磷酸锌 添加剂 摩擦膜 热反应膜 摩擦磨损 润滑特性 

分 类 号：TH117.2[机械工程—机械设计及理论]