Mishra, R. S. ; Jayaram, V. ; Majumdar, B. ; Lesher, C. E. ; Mukherjee, A. K. (1999) Preparation of a ZrO2-Al2O3 nanocomposite by high-pressure sintering of spray-pyrolyzed powders Journal of Materials Research, 14 (03). pp. 834-840. ISSN 0884-2914
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Official URL: http://journals.cambridge.org/action/displayAbstra...
Related URL: http://dx.doi.org/10.1557/JMR.1999.0111
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 t → m 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Cambridge University Press. |
| ID Code: | 63048 |
| Deposited On: | 24 Sep 2011 15:00 |
| Last Modified: | 24 Sep 2011 15:00 |
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