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Formation Process of Ti3Al in Ti/Al2O3 System

Published online by Cambridge University Press:  10 February 2011

M. Maruyama ,
S. Nakamura ,
S. Suenaga  and
M. Nakahashi
M. Maruyama
Affiliation:
Matls. & Devices Res. Labs., Toshiba Corp., 1 Komukai Toshiba-cho, Saiwai, Kawasaki 210, Japan
S. Nakamura
Affiliation:
Environmental Eng. Labs., Toshiba Corp., 1 Komukai Toshiba-cho, Saiwai, Kawasaki 210, Japan
S. Suenaga
Affiliation:
Matls. & Devices Res. Labs., Toshiba Corp., 1 Komukai Toshiba-cho, Saiwai, Kawasaki 210, Japan
M. Nakahashi
Affiliation:
Heavy Apparatus Eng. Lab., Toshiba Corp., Suehiro-cho, Turami, Yokohama 230, Japan
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Abstract

It has been reported that Ti reduces Al2O3 forming Ti3Al at the interface. From the viewpoint that the structural change of the Ti3Al phase influences the metal-ceramic joining strength, the Ti3Al formation process was analyzed by XPS, XRD, TEM and RBS. Titanium films were deposited on the (1102) surface of Al2O3 substrates and annealed. XRD analysis shows that Ti3Al formation starts at 1073 K. Initially, the (1120) and (2020) Ti3Al planes are oriented parallel to the surface. After 1173 K-300 s heat treatment, XRD shows only the (2020) Ti3Al peak; After 1173 K-600 s heat treatment, HREM observation shows that the lattices of the Ti3Al (0220) plane match those of the A12O3 (1210) plane at the interface. It is suggested that the (2020) oriented grains grow preferentially on the (1102) Al2O3 plane.

The quantity of formed Al increases with heating time. After 420 s, the rate of Al formation falls off. The rate of the Al2O3 reduction is in good agreement with the slightly modified Johnson-Mehl equation. The Ti2O/Ti3Al(O)/Al2O3 layer sequence and morphology can be explained by the pure Ti decrease.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 458: Symposium W – Interfacial Engineering for Optimized Properties , 1996 , 349
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

1. Kang, S. and Selverian, J. H., J. Mater. Sci. 27, 4536 (1992)Google Scholar
2. Selverian, J. H., Ohuchi, F. S., Boltz, M. and Notis, M. R., J. Mater. Sci. 26, 6300 (1991)Google Scholar
3. Tressler, R. E., Moore, T. L. and Crane, R. L., J. Mater. Sci. 8, 151 (1973)Google Scholar
4. Wang, H. F., Gerberich, W. W. and Skowronek, C. J., Acta Metall. Mater. 41, 2425 (1993)Google Scholar
5. Lu, Y. C., Sass, S. L., Bai, Q., Kohlstedt, D. L. and Gerberrich, W. W., Acta Metall. Mater. 43, 31 (1995)Google Scholar
6. Floriancic, M., Mader, W., Rühle, M. and Turwitt, M., J. Physique Coll. 46–C4, 129 (1985)Google Scholar
7. Elssner, G., Suga, T., Turwitt, M., J. Physique Coll. 46–C4, 597 (1985)Google Scholar
8. Guy, A. G. and Oikawa, H., Trans. AIME 245, 2293 (1969)Google Scholar
9. Nakao, Y., Nishimoto, K., Saida, K., Katada, K., Quart. J. J. Weld. Soc. 7, 531 (1989)Google Scholar
10. Wert, C. and Zener, C., J. Appl. Phys. 21, 5 (1950)Google Scholar
11. Li, X. L., Hikkel, R., Teyssandier, F., Choi, S. K., Van Loo, F. J. J., Acta Metall. Mater. 40, 3149 (1992)Google Scholar