Tribology of Cu_2S comparing with MoS_2 as a solid lubricant

摘要

MoS_2 is a well-known metal sulfide applied as film lubricant and an additive to enhance performance in sintered bearing. However, a high price of MoS_2 limited its wide application. High purity powders, Cu_2S as a substitute of MoS_2, were produced by a unique process in this study and then, evaluated physical characteristics of themselves as well as tribology and the performance of sintered bearing with a small-amount addition of Cu_2S comparing with MoS_2 powders. Especially in case of bearing materials, Cu_2S powder were more effective additive than MoS_2 powder were more to enhance working performance. In the present work, it was suggested that Cu_2S could be a promising substitute of MoS_2 on the basis of performance and cost as well.