Tribological properties of solid lubricants (graphite, MoS2) for Ni based materials

Ni based materials with solid lubrication of 0%, 10% MoS 2 , 10% graphite, 5% MoS 2 +5% graphite at weight fractions were fabricated by a P/M hot press method, respectively. The effects of graphite and MoS 2 on tribological properties of Ni based materials were investigated on a pin-on-disk tester. Worn surfaces, microstructures of materials were characterized by scanning electron microscopy(SEM). Results indicate that lubrication effects of MoS 2 are superior to that of graphite, and the materials with 10% MoS 2 has a low and stable wear rates and friction coefficient.