Abstract
The oxidation process of two-phase (Ti3Al and TiAl) intermetallic compound, Ti-42 at% Al, in air at 1073 and 1273 K has been investigated. The oxidation at 1273 K is much faster than that at 1073 K; however, the oxidation kinetics are similar. During heating up, TiO2 scale forms initially on the compound surface at about 973 K, and then Al2O3 scale forms at about 1273 K. For the isothermal heating, TiO2 scale slowly grows up at 1073 K, while at 1273 K both TiO2 and Al2O3 scales grow up drastically. The outer oxide scale consists of TiO2 and the inner one consists of a mixture of TiO2 and Al2O3. The volume of Al2O3, which forms after TiO2 formation at the initial stage of oxidation, is larger at an area adjacent to the oxide-compound interface.
Similar content being viewed by others
References
T. Kawabata, T. Kanai and O. Izumi, Acta Metall. 33 (1985) 1355.
M. Kabbaj, A. Galerie and M. Caillet, J. Less-Common Metals 108 (1985) 1.
Y. Umakoshi, M. Yamaguchi, T. Sakagami and T. Yamane, J. Mater. Sci. 24 (1989) 1599.
E. U. Lee and J. Waldman, Scripta Metall. 22 (1988) 1389.
S. Taniguchi, T. Shibata and S. Sakon, in Proceedings of International Symposium on Intermetallic Compounds (JIMIS-6), Sendai, Japan, June 1991, edited by O. Izumi (Japan Institute of Metals, Sendai, Japan) p. 719.
H. Anada and Y. Shida, ibid.in p. 731.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Takasaki, A., Ojima, K., Taneda, Y. et al. High-temperature oxidation process of intermetallic compound Ti-42 at% Al. Journal of Materials Science 28, 1067–1073 (1993). https://doi.org/10.1007/BF00400894
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00400894