中文摘要：

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.

英文摘要：

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.