Tribological Performance of Ni3Al Self-Lubricating Composites with Different Content of TiC at Elevated Temperature

摘要

Ni3Al-MoS2-TiC composites (NMTC) were fabricated using spark plasma sintering. The effect of TiC content on tribological properties and antiwear mechanisms of NMTC at high temperatures was investigated. The results showed that NMTC containing 10 wt% MoS2 and 6 wt% TiC exhibited the excellent tribological properties from 25 to 600 degrees C. At 400 degrees C, NMTC had the lowest friction coefficient of 0.28 and the considerable lower wear rate of 3.02 x 10(-5) mm(3) N-1 m(-1). The excellent tribological properties of NMTC were attributed to the synergetic action of the lubricant-phase MoS2 and reinforcing-phase TiC.