Friction and wear properties of lead-free aluminum alloy bearing material with molybdenum disulfide layer by a reciprocating test

摘要

Friction and wear behavior of Al-Sn-Si alloy with MoS_2 layer under lubricated condition was investigated by a reciprocating friction tester. It became clear that the Al-Sn-Si alloy with MoS_2 layer showed about 70% lower friction and about 1/10 lower wear depth compared to the Al-Sn-Si alloy. The worn surfaces of the Al-Sn-Si alloy with MoS_2 layer were observed and analyzed by a SEM, a TEM and an EDX. It indicated that the sliding surface of the counterface had larger area of Mo than the area of Al which was transferred from the Al-Sn-Si alloy with MoS_2 layer by sliding, resulting in low friction and high wear resistance.