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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.