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研究了原位生成ＴｉＣ／Ｔｉ５Ｓｉ３纳米复合材料的显微结构．实验结果表明，以ＳｉＣ和Ｔｉ 为原料，通过反应热压工艺可以原位合成ＴｉＣ／Ｔｉ５Ｓｉ３复合材料，其中的大部分ＴｉＣ粒子为纳 米粒子．ＴｉＣ晶粒与Ｔｉ５Ｓｉ３晶粒的晶界上存在原子台阶．复合材料还含有少量Ｔｉ３ＳｉＣ２相．这 些Ｔｉ３ＳｉＣ２相主要呈棒状分布在Ｔｉ５Ｓｉ３基体中，另有少量Ｔｉ３ＳｉＣ２相位于大的ＴｉＣ晶粒内．
The microstructure of in-situ TiC / Ti5Si3 nanocomposites was investigated. The experimental results show that TiC / Ti5Si3 composites can be synthesized in-situ by reaction hot-pressing with SiC and Ti as raw materials, and most of the TiC particles are nanoparticles. There are atomic steps on the grain boundaries of TiC and Ti5Si3 grains. The composite also contains a small amount of Ti3SiC2 phase. These Ti3SiC2 phase mainly rod-like distribution in the Ti5Si3 matrix, while a small amount of Ti3SiC2 phase in the large TiC grains.