摘要
采用机械力固相化学反应法制备了稀土铈掺杂白云母(Muscovite,MC)的复合粉体(Ce-MC),表征了粉体的微观形貌、晶体结构、元素组成和粒径分布。利用四球摩擦磨损试验机考察比较了MC和Ce-MC作为润滑脂添加剂的摩擦学性能,对磨损表面进行了SEM、EDS和XPS分析,并探讨了Ce-MC的减摩抗磨机理。结果表明:CeMC复合粉体中铈化合物包覆在白云母粉体表面,主要物相为CeO_2;Ce-MC和MC作为添加剂均能提高锂基润滑脂的减摩抗磨性能,且Ce-MC复合粉体的摩擦学性能优于MC单体;Ce-MC优良的摩擦学性能与其磨损表面Ce-MC的物理吸附膜和主要成分为Fe_2O_3、SiO_2的化学反应膜有关。
Cerium doped muscovite composite particles were prepared by mechanical solid state chemistry reaction method,abbreviated Ce MC.The morphologies,elementary composition,phase composition and size distribution of the material were characterized.The friction reduction and anti wear properties of MC and Ce MC as lubricant additives in lithium grease were investigated using a four ball tribotester and the worn surface was analyzed by scanning electron microscope(SEM),energy dispersive spectroscopy(EDS)and X ray photoelectron spectroscope(XPS)to explore the tribological mechanism.The results showed that cerium compounds,of which the main phase was CeO2in composite particles,were coated on the surface of muscovite.Both Ce MC and MC can improve the friction reduction and anti wear properties of lithium grease and Ce MC presents better tribological performance than that of MC.The excellent tribological performance of Ce MC can be attributed to the formation of the adsorption film of Ce MC as well as the chemical reaction film mainly consisting of Fe2O3and SiO2on the worn surface.
作者
杜鹏飞
陈国需
宋世远
史永刚
程鹏
杨皛
DU Pengfei;CHEN Guoxu;SONG Shiyuan;SHI Yonggang;CHENG Peng;YANG Xiao(Department of Oil Application &Management Engineering, Logistical Engineering University, Chongqing 401311;Department of Chemistry & Matreial Engineering, Logistical Engineering University, Chongqing 401311;Training Department, Logistical Engineering University, Chongqing 401311)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2016年第24期76-81,共6页
Materials Reports
基金
重庆市博士后基金(Xm 201318)
总后勤部项目(oil 20070209)
关键词
白云母
复合粉体
润滑脂添加剂
减摩抗磨机理
muscovite
composite particles
lubricant additives
friction reduction and anti wear mechanism
