Tribological properties of nanometer cerium oxide as additives in lithium grease

Research finding: Under the lubrication of the lithium grease containing 0.6 wt% nano-CeO2, few shallow furrows can be observed on the quite smoothed surface. It was found that the nano-CeO2 have been incorporated into the surface protective and lubricious layer by energy dispersive spectrometer (EDS) analysis.205