Effect of Composition on Friction Co-efficient of Copper based Cu-Sn-MoS2 Composites

Pure copper materials are not used as journal bearing material due to their low mechanical and hardness properties. With technological improvements, self-lubricated sintered bearings and plastic materials are used where continuous lubricating is impossible. Cu-composites were prepared by powder metallurgy method from copper, tin and solid lubricant (MoS2) powders in the range of 0-7 wt% of MoS2. The wear tests with an experimental plan of six loads (5-30 N) and five sliding speeds (0.5-2.5 m/s) were conducted on Pin-On-Disc machine to record a loss in mass due to wear for a six total sliding distance of 500 to 3000m. It was confirmed that with increasing concentration of MoS2, the coefficient of friction of composites decreases.