LIANG Baoyan ^{1, 2}, ZHANG Wangxi ^{1, 2}, FENG Yanxiang ^{1, 2}
(1.Materials and Chemical Engineering School, Zhongyuan University of Technology, Zhengzhou 450007, Henan, China
2. National and Local Joint Laboratory of Engineering of Diamond Technology, Zhengzhou 451191, Henan, China)

Abstract: TiC- Ti₅Si₃ composites were in situ synthesized by salt molten heat treatment using Ti, Si and C powders. The result shows that the raw materials were fully transformed to TiC and Ti₅Si₃. Ti₅Si₃ grains in the sample at 900 ℃ were dentritic. It had a diameter of about 60nm and a length of 0.5~1 μm. TiC grains in this sample were granules. It had an average size of 50~200 nm. Dentritic Ti₅Si₃ grains had a diameter of 0.1~0.5 μm and a length of 2~6 μm in the sample at 1100 ℃. TiC grains had an average size of 50~500 nm.

Key words: Salt molten synthesis; TiC; Ti₅Si₃