Tribological Performance of Ni 3 Al Self-Lubricating Composites with Different Content of TiC at Elevated Temperature.

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°C. At 400°C, NMTC had the lowest friction coefficient of 0.28 and the considerable lower wear rate of 3.02 × 10⁻⁵ mm³ 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. [ABSTRACT FROM AUTHOR]