Abstract
Abstract Promoting the application of carbon nanomaterials in space has special significance because their excellent electroconductivity can provide pathways to eliminate electrostatic accumulation as compared with the traditional space solid lubricant such as MoS2. Herein, tribological behaviors of graphene and C60 are investigated by a ball-on-disk tribometer in vacuum environment. The morphology and chemical composition of worn surface are examined by TEM and Raman spectra. Experimental results show that graphene and C60 exhibit low friction coefficient value of 0.018 and 0.125, respectively. Friction-induced ordered structure is account for the excellent friction behavior of graphene, while the special sphere structure enables the good wear resistance of C60. The present study helps to understand the lubrication mechanism of carbon nanomaterial in vacuum.
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