Abstract
The tribological behaviors of the Ni
3
Al-WS
2
-Ti
3
SiC
2
composites and synergistic effect of composite solid lubricants are investigated from room temperature to 800°C. The results show that the Ni
3
Al matrix composites (NASC) exhibit excellent tribological properties throughout the test temperatures compared to Ni
3
Al-based alloy. The excellent tribological properties of NASC are attributed to the synergistic lubricating effect of WS
2
and Ti
3
SiC
2
. A lubricating film could be formed below 400°C, and an oxidation protection film is formed above 400°C on the worn surface of NASC during the sliding process, leading to low coefficients of friction (0.18-0.39) and wear rates (1.5-3.7 × 10
−5
mm
3
N
−1
m
−1
).