化学ポテンシャル図を用いたTiAl/Al_2O_3及びTiAl/TiO_2の界面反応の解析

概要

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Interface reactions for the diffusion couples of TiAl/Al_2O_3 and TiAl/TiO_2 were investigated and the reaction paths were analyzed by the use of chemical potential diagram. No essential reaction was observed at 1273 K for the diffusion couple of TiAl/Al_2O_3, but Ti_3Al(O)was formed between TiAl(O)and Al_2O_3 phases at 1373 K. In the case of TiAl/TiO_2, Ti_3Al(O)and Al_2O_3 were formed between TiAl(O)and TiO_2 phases. These reaction paths were reasonably elucidated by the use of chemical potential diagram of the Ti-Al-O system, which was constructed using the data of Gibbs energy of formation for the compounds composed of Ti, Al and O. The reaction paths for the diffusion couple of Ti/Al_2O_3 and oxidation of TiAl obtained from the literature data were also reasonably elucidated by the use of the same chemical potential diagram.
社団法人日本セラミックス協会の論文
1997-09-01