Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Diffusion Path and Reaction Mechanism between Ti and B4C

TANG Jian-Xin1; CHENG Ji-Hong2; ZENG Zhao-Qiang2; MIAO He-Zhuo 2   

  1. 1.Institute of Aeronautical Materials; Beijing 100095; China; 2. Tsinghua University; Beijing 100084; China
  • Received:1999-09-20 Revised:1999-10-12 Published:2000-10-20 Online:2000-10-20

Abstract: The beginning temperature of chemical reaction between Ti and B4C and the production phase after soaking 0.5h at 1600℃ were determined by DT and XRD, respectively. The mechanism of chemical reaction was studied by the diffusion couples of Ti-B4C. It shows that the diffusion path is Ti/TiC/TiB/TiB2/B4C and the (TiB2+TiC+TiB) triple phases coexist in the Ti-B4C diffusion couples. However, there exist two phases of TiB2 and TiC for the powders of Ti+B4C sintered at 1600℃.

Key words: TiB2, TiC, diffusion couples

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