Diffusion Path and Reaction Mechanism between Ti and B4C

Journal of Inorganic Materials

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Diffusion Path and Reaction Mechanism between Ti and B₄C

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

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

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

CLC Number:

TQ163

TANG Jian-Xin,CHENG Ji-Hong,ZENG Zhao-Qiang,MIAO He-Zhuo. Diffusion Path and Reaction Mechanism between Ti and B₄C[J]. Journal of Inorganic Materials.

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Diffusion Path and Reaction Mechanism between Ti and B₄C

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