Abstract
Cuprous sulfide (Cu2S) nanoparticles as functional fillers were in-situ synthesized in Polyamideimide (PAI) - Polytetrafluoroethylene (PTFE) bonded solid lubricating coatings. The results indicated that Cu2S nanoparticles were homogeneously dispersed in lubricating coatings with small grain size. Agglomeration problem of nano-functional fillers in lubricating coatings during its fabrication process was well resolved. When incorporation mass percent of Cu2S nanoparticles reached 5.0%, the micro-hardness of lubricating coatings elevated about 109%, wear rate decreased about 40% and wear life ascended about 3 times, respectively. Subsequently, the adaptability research of lubricating coatings under various applied loads and sliding frequencies indicated that the lubricating coatings exhibited the most excellent anti-wear ability under applied load of 10 N and sliding frequency of 7 Hz. Load-carrying capacity of the lubricating coatings was substantially promoted by appropriate incorporation of in-situ synthesized Cu2S nanoparticles. In pace with enlarged sliding frequencies, wear degree of lubricating coatings adversely alleviated, but superhigh sliding frequency brought fatal abrasion to lubricating coatings.
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