Lubricating behavior of adaptive nickel alloy matrix composites with multiple solid lubricants from 25 °C to 700 ºC

There is an increasing need to high temperature solid lubricant materials and techniques for moving system worked at high temperatures. In this study, the nickel alloy matrix composites with solid lubricants of Ag, CaF2 and MoS2 were fabricated by hot pressed sintering approach and their tribological properties in air from room temperature to 700 ºC were investigated. Results indicated that the composites exhibited low friction coefficient of 0.16-0.40 and wear rate of (1-29.4)×10−5 mm3 N−1 m−1. The favorable lubricating properties were attributed to the synergistic effect of the added solid lubricants and the oxide formed in situ on the worn surface.