Abstract:
The friction behavior of MoS
2-Au film /SiCH (silahydrocarbon) oil composite system was investigated in various humidities using a ball-on-disk tribometer. Compared with the single MoS
2-Au solid film or SiCH oil lubrication condition, a synergy lubrication effect was displayed when they were combined to a composite system. The steady-state friction coefficient reduced largely as the environment was changed from low to high humidity, while wear rate varied in a inverse trend. The results of Raman and FTIR revealed that no tribo-chemical reactions occurred for SiCH oils during the friction. A structure model of dual liquid lubrication, combining SiCH with the adsorbed water on the base plane of MoS
2, was proposed to explicate the friction behavior in high humidity, where the declined friction coefficient was attributed to the low shear strength at the interface of water and SiCH layers.
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