Abstract
High-temperature creep in undoped Al2O3 and La2O3- or Y2O3- or Lu2O3-doped Al2O3 with a grain size of about 1 µm is examined in uniaxial compression testing at temperatures between 1150 and 1350 °C. The high-temperature creep resistance in Al2O3 is highly improved by the rare-earth oxide doping in the level of 0.045 mol %, and the creep rate is suppressed in the order La2O3 <Y2O3 <Lu2O3. Rare-earth ions in each doped Al2O3 are found to segregate in Al2O3 grain boundaries without forming amorphous phase or second-phase particles. The activation energy for creep in undoped Al2O3 is estimated to be 410 kJ/mol, while it is about 800 kJ/mol in the three rare-earth oxide-doped Al2O3. The grain boundary diffusivity must be highly reduced by the segregation of the dopant cation in Al2O3 grain boundaries.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. E. Paladino and R. L. Coble, J. Am. Ceram. Soc. 46, 133–136 (1963).
A.H. Heuer, R. M. Cannon, and N. J. Tighe, in Ultrafine-Grain Ceramics, edited by J. J. Burke, N. L. Reed, and V. Weiss (Syracuse University Press, Syracuse, NY, 1970), pp. 339–365.
T.G. Langdon and F.A. Mohamed, J. Mater. Sci. 13, 473–482 (1978).
A.H. Heuer, N. J. Tighe, and R. M. Cannon, J. Am. Ceram. Soc. 63, 53–58 (1980).
H.J. Frost and M.F. Ashby, in Deformation–Mechanism Maps (Pergamon, Oxford, U.K., 1982), p. 98.
A.H. Chokshi and J. R. Porter, J. Mater. Sci. 21, 705–710 (1986).
F. Wakai, T. Iga, and T. Nagano, Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi 96, 1206–1209 (1988).
A.H. Chokshi and T. G. Langdon, Mater. Sci. Tech. 25, 577–584 (1991).
A.H. Chokshi, J. Mater. Sci. 25, 3221–3228 (1990).
J. Cho, M.P. Harmer, H.M. Chan, J.M. Rickman, and A.M. Thompson, J. Am. Ceram. Soc. 80, 1013–1017 (1997).
H. Yoshida, K. Okada, Y. Ikuhara, and T. Sakuma, Philos. Mag. Lett. 76, 9–14 (1997).
T. Sakuma, Y. Ikuhara, Y. Takigawa, and P. Thavorniti, Mater. Sci. Eng. 234–236, 226–229 (1997).
Y. Takigawa, Y. Ikuhara, and T. Sakuma, in Materials Science Forum, Vols. 243–245, Proceedings of the 1997 International Conference on Superplasticity in Advanced Materials (ICSAM-97), edited by A. H. Chokshi (Trans Tech Publications, Switzerland, 1997), pp. 425–430.
L.A. Xue and I-W. Chen, J. Am. Ceram. Soc. 73, 3518–3521 (1990).
B. Burton, Mater. Sci. Eng. 10, 9–14 (1972).
A. K. Mukherjee, Mater. Sci. Eng. 8, 83–89 (1971).
R. C. Gifkins, Metall. Trans. A 7A, 1225–1232 (1976).
A. Arieli and A. K. Mukherjee, Mater. Sci. Eng. 45, 61–70 (1980).
R.M. Cannon, W.H. Rhodes, and A.H. Heuer, J. Am. Ceram. Soc. 63, 46–53 (1980).
Y. Oishi and W. D. Kingery, J. Chem. Phys. 33, 480–486 (1960).
M. L. Gall, B. Lesage, and J. Bernardini, Philos. Mag. A 70, 761–773 (1994).
D. Prot and C. Monty, Philos. Mag. A 73, 899–917 (1996).
M. Mizuno, R. Berjoan, J.P. Coutures, and M. Foex, Yogyo Kyokaishi 82, 631–636 (1976).
T. Noguti and M. Mizuno, Kogyo Kagaku Zasshi 70, 834–839 (1967).
S. J. Schneider, R. S. Roth, and J. L. Waring, J. Research Natl. Bur. Standards 65A, 345–374 (1961).
L. Priester and S. Lartigue, J. Eur. Ceram. Soc. 8, 47–57 (1991).
R. D. Shannon, Acta. Crystallogr. A32, 751–767 (1976).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Yoshida, H., Ikuhara, Y. & Sakuma, T. High-temperature Creep Resistance in Rare-earth-doped, Fine-grained Al2O3. Journal of Materials Research 13, 2597–2601 (1998). https://doi.org/10.1557/JMR.1998.0362
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1998.0362