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Preparation of a ZrO2–Al2O3 nanocomposite by high-pressure sintering of spray-pyrolyzed powders

  • R. S. Mishra (a1), V. Jayaram (a2), B. Majumdar (a2), C. E. Lesher (a3) and A. K. Mukherjee (a1)...

Abstract

ZrO2–Al2O3 powders were synthesized by spray pyrolysis. These powders were sintered at 1 GPa in the temperature range of 700–1100 °C. The microstructural evolution and densification are reported in this paper. The application of 1 Gpa pressure lowers the crystallization temperature from ∼850 to <700 °C. Similarly, the transformation temperature under 1 GPa pressure for γ → α–Al2O3 reduces from ∼1100 to 700–800 °C range, and that for tm ZrO2 reduces from ∼1050 to 700–800 °C range. It was possible to obtain highly dense nanocrystalline ZrO2–Al2O3 composite at temperatures as low as 700 °C. The effect of high pressure on nucleation and transformation of phases is discussed.

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1.Yoshimatsu, H., Yabuki, T., and Kawasaki, H., J. Non-Cryst. Solids 100, 413 (1988).
2.Yamaguchi, O., Shirai, M., and Yoshinaka, M., J. Am. Ceram. Soc. 71, C510 (1988).
3.Balmer, M. L., Lange, F. F., and Levi, C. G., J. Am. Ceram. Soc. 77, 2069 (1994).
4.Balmer, M. L., Lange, F. F., Jayaram, V., and Levi, C. G., J. Am. Ceram. Soc. 78, 1489 (1995).
5.Balmer, M. L., Eckert, H., Das, N., and Lange, F.F., J. Am. Ceram. Soc. 79, 321 (1996).
6.Mishra, R. S., Lesher, C. E., and Mukherjee, A. K., J. Am. Ceram. Soc. 79, 2989 (1996).
7.Messing, G. L., Chang, S-C., and Jayanthi, G. V., J. Am. Ceram. Soc. 76, 2707 (1993).
8.Jayaram, V., Mishra, R. S., Majumdar, B., Lesher, C. E., and Mukherjee, A. K., in Proceedings of Particle Science and Technology in the 21st Century (Engineering Foundation, New York, 1998).
9.Boyd, F. R. and England, J.L., J. Geophys. Res. 65, 741 (1960).
10.Dupree, R., Lewis, M. H., and Smith, M.E., J. Appl. Crystallogr. 21, 109 (1988).
11.Polli, A. D., Lange, F. F., Levi, C. G., and Mayer, J., J. Am. Ceram. Soc. 79, 1745 (1996).
12.Christian, J. W., The Theory of Transformation in Metals and Alloys, 2nd ed. (Pergamon Press, Oxford, 1975), p. 460.
13.Gandhi, A. S., Jayaram, V., and Chokshi, A.H., Mater. Sci. Forum 243–245, 227 (1997).
14.Jayaram, V., Levi, C. G., Whitney, T., and Mehrabian, R., Mater. Sci. Eng. A214, 65 (1990).
15.Dynys, F. and Halloran, J. W., J. Am. Ceram. Soc. 65, 442 (1982).

Preparation of a ZrO2–Al2O3 nanocomposite by high-pressure sintering of spray-pyrolyzed powders

  • R. S. Mishra (a1), V. Jayaram (a2), B. Majumdar (a2), C. E. Lesher (a3) and A. K. Mukherjee (a1)...

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