Study of the Wear Behavior of HDPE-Molybdenum Disulphide Composites

摘要

This work investigates tribological study of high-density polyethylene-molybdenum disulphide (HDPE-MoS_2) bio-composites via an alternative pin-disk tribotester in the dry conditions. The stainless steel pin (M30NW) was used as a counter-part. The obtained HDPE powder after crushing was blended with MoS_2 particles with various proportions (0, 2, 4, 6, 10 and 25 wt%). HDPE composite specimens were elaborated with thermal-compression molding press. The coefficient of friction of the HDPE composite decreased considerably after reinforcing with MoS_2 for all loadings. The specific wear rate was improved by over 40% for up to a loading of 6 wt% MoS_2. It was found that the utilization of molybdenum disulphide improves tribological behavior of the elaborated composites in respect of the unfilled HDPE and the optimal content was about 4 wt%. In fact, after the wear test the optimized percent exhibited a decrease of 30% for the coefficient friction and 55% for the specific wear rate.