Tribological behavior of in-situ (Cr, Mo)/Fe₃Al-20 wt.%Al ₂O₃ composites at elevated temperatures

Dry-sliding tribological performance of in-situ Fe₃Al-20 wt.%Al₂O₃, (4 wt.%Cr)/Fe₃Al-20 wt.%Al ₂O₃, and (4 wt.%Cr, 5 wt.%Mo)/Fe₃Al-20 wt.%Al₂O₃ composites, produced by mechanically induced self-propagating mechanism and plasma-activated sintering, was investigated against Inconel718 from 25° to 800° under air/argon atmosphere. It can be found that (4 wt.%Cr, 5 wt.%Mo)/Fe₃Al-20 wt.%Al₂O ₃ composite exhibits more excellent comprehensive tribological properties with the friction coefficient decrease nearly 67% compared to Fe ₃Al-20 wt.%Al₂O₃ composite above 350° due to the balance between strength and lubricity. At 800°, the dominant wear mechanism is oxidation wear under air condition, whereas under argon atmosphere, the actual wear mechanism is mainly transferred to microploughing.