Wear Behavior of Electrified Copper–MoS₂ Powder Metallurgy Materials Under Dry Sliding

Copper alloys without molybdenum disulfide and those containing 10 wt.% and 20 wt.% MoS₂ were prepared by means of powder metallurgy. Utilizing an experimental pin-disk apparatus, the tribological behavior of electrified pins fabricated from the various alloy composites was investigated as a result of their interaction with a QCr0.5 bronze disk in motion. The results indicate that the friction coefficient and wear rates of the Cu–MoS₂ composites are greatly reduced as compared to the copper alloy alone, material containing MoS₂ displayed a relatively constant in friction coefficient for all currents and speeds tested. The frictional coefficients and the wear rates for both the Cu–10% MoS₂ and Cu–20% MoS₂ alloy composites are very similar for each current and speed tested.