Tribological properties of nanometer cerium oxide as additives in lithium grease

查看全文 作　　者：Qiang [1]He;Anling [1]Li;Yachen [1]Guo;Songfeng [1]Liu;Yong [1]Zhang;Linghao [1]Kong

机构地区：[1]Department of Mechanical Engineering, Anyang Institute of Technology

出　　处：《Journal of Rare Earths》索引2018年第36卷第2期,共6页

基　　金：Project supported by the Natural Science Foundation of the Henan Province(152102210196);the Foundation of the Henan Educational Committee(16A460001) 摘　　要：This paper presents a comparative study of the influence of nanometer-CeO_2(nano-CeO_2) and temperature on tribological and lubricating properties of lithium grease. The morphology and structure of nanocrystals were characterized by means of transmission electron microscopy(TEM) and X-ray diffraction(XRD), respectively. Friction and wear tests were conducted on the friction and wear tester.Results show that the lithium grease with addition of nanometer-CeO_2 has much better friction-reducing and anti-wear performance than that of base grease. When the additive in grease is 0.6 wt%, the friction coefficient(COF) and wear scar diameter(WSD) decrease by 28% and 13% comparing with base grease,respectively. The base grease and grease with 0.6 wt% nanometer-CeO_2 both possess the lowest average COF and wear width at 50 ℃. The worn surface morphology after friction test was analyzed by scanning electron microscopy(SEM) and NANOVEA three-dimensional profilometer. Under the lubrication of the lithium grease containing 0.6 wt% nano-CeO_2. few shallow furrows can be observed on the quite smoothed surface and the WSD decreased. Moreover, It was found that the nano-CeO_2 has been incorporated into the surface protective and lubricious layer by energy dispersive spectrometer(EDS) analysis. 关键词：润滑油添加剂铈氧化物性质扫描电子显微镜表面形态学磨擦系数锂

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Tribological properties of nanometer cerium oxide as additives in lithium grease

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