提出制备Ti3SiC2-SiC复合材料的一种新思路,即利用液态硅渗透TiC/C预制体原位反应制备Ti3SiC2-SiC复合材料,并采用XRD、SEM和EDS考察了材料的显微结构和力学性能.结果表明:制备出材料主要由Ti3SiC2相组成,SiC相含量较少;Ti3SiC2晶相呈现出3～10μm大小的层状结构;施加10kg的压力下测得样品S1550-1,S1550-3和S1550-4的硬度分别为6.8GPa、7.1GPa和7.8GPa,它们的密度在3.55～3.96g/cm3范围内.实验结果表明,利用液态硅渗透技术原位制备Ti3SiC2-SiC复合材料是一种可行的新工艺. A new method of preparing Ti3SiC2-SiC composites was proposed. Ti3SiC2-SiC composites were prepared by in-situ reaction of liquid silicon infiltrated TiC / C preforms. The microstructures and mechanical properties of the composites were investigated by XRD, SEM and EDS The results show that the material is mainly composed of Ti3SiC2 phase and the content of SiC phase is small, the crystal phase of Ti3SiC2 presents a layered structure with the size of 3 ~ 10μm, and the samples S1550-1, S1550-3 and S1550 -4 were 6.8GPa, 7.1GPa and 7.8GPa, respectively, and their densities ranged from 3.55 to 3.96g / cm3.Experimental results show that in-situ preparation of Ti3SiC2-SiC composites by liquid-state silicon infiltration is feasible New Technology.