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.