A Novel in-situ Synthesis Route of Ti_3SiC_2-SiC Composite by Liquid Silicon Infiltration

The aim of the present work was to prepare Ti3SiC2-SiC composite by using liquid silicon infiltration(LSI)from TiC/C preform.XRD,SEM and EDS were used to identify the formed phases and analyze the micro-structures of the obtained composites.The results show that the composites are made of Ti3SiC2 and small SiC.The surface morphologies of Ti3SiC2 exhibit plate-like structure with the grain size of 3-10um.The hardness of S1550-1,S1550-3 and S1550-4 is 6.8GPa,7.1GPa and 7.8GPa for a load of 10kg,respectively.Their density is in the range of 3.55-3.96g/cm3.All the experimental results prove that the novel in situ synthesis route of Ti3SiC2-SiC composite by LSI is feasible.