Tribological Properties of Ti_3SiC_2 with MoS_2 on Different Conditions

Ti3SiC2 multiphase ceramics with 4% MoS2 were fabricated by hot press sintering (HP). Friction and wear behaviors were studied for Ti3SiC2 multiphase ceramics/GCr15 steel pairs under unlubricated and lubricated conditions,and wear mechanism was analyzed. The examinations indicate that the dominant wear mechanism of Ti3SiC2 multiphase ceramics/GCr15 steel changes along with time,that is,from abrasive wear to adhesive wear under unlubricated condition;the friction coefficient is about 0.176～0.283 and the maximum wear rate is 2.657×10-6mm3·N-1·m-1. However,the friction coefficient under lubricated condition is 0.062～0.134,and the wear rate is about 10-7～10-6mm3·N-1·m-1. Dry friction coefficient of the multiphase ceramics is slightly higher than that of single-phase Ti3SiC2,0.17.