Tribological properties of plasma carburized TiAl alloy

To improve the wear resistance of TiAl alloy,the carburized layer was prepared by plasma carburizing.The tribological property of the carburized layer at room temperature and at 600 ℃ was studied under dry sliding condition using friction and wear tester.The morphology and composition of worn surfaces as well as the microstructure of the carburized layer were analyzed by GDS,XRD,EDS attached on SEM.The result shows that the carburized layer mainly consists of Ti2AlC and the tribological property of carburized TiAl is improved.Both the coefficient of friction and wear volume of the carburized TiAl at ambient temperature is significantly lower than that of bare TiAl,exhibiting better friction and wear resistances.At 600 ℃,the coefficient of friction has no obvious difference between plasma carburized and bare TiAl specimens,but the wear volume of carburized TiAl decreases,which means that the wear resistance of TiAl alloy is improved.