Tribological Behaviors of NiAl-Ti₃SiC₂Self-Lubricating Composites at Elevated Temperatures

Abstract

AbstractThe tribological behaviors of NiAl-Ti3SiC2 composites (NMC) against Si3N4 at elevated temperatures were investigated by carrying out dry sliding wear tests at the condition of 10 N–0.2 m/s. The results showed that NMC without Ti3SiC2 had a high friction coefficient and wear rate at elevated temperatures, and the addition of Ti3SiC2 could improve the high-temperature tribological properties. Both the friction coefficient and wear rate of NMC obviously decreased at 600 and 800°C with the addition of Ti3SiC2. The excellent tribological behaviors of NMC with 5 wt% Ti3SiC2 at elevated temperatures implied that 5 wt% Ti3SiC2 could be the optimal content.KEY WORDS: Solid LubricantsSelf-Lubricating CompositesSelf-Lubrication FrictionSolid Lubrication WearSelf-Lubrication ACKNOWLEDGMENTThe authors wish to gratefully thank the Material Research and Testing Center of Wuhan University of Technology for their assistance.