ZrO2-Al2O3 powders were synthesized by spray pyrolysis. These powders were sintered at 1 GPa in the temperature range of 700Ç1100 ÉC. The microstructural evolution and densification are reported in this paper. The application of 1 GPa pressure lowers the crystallization temperature from ~850 to 700 ÉC. Similarly, the transformation temperature under 1 GPa pressure for <>g ê a Al2O3 reduces from ~1100 to 700Ç800 ÉC range, and that for t <>ê m ZrO2 reduces from ~1050 to 700Ç800 ÉC range. It was possible to ob-tain highly-dense nanocrystalline ZrO2-Al2O3 composite at temperatures as low as 700 ÉC. The effect of high pressure on nucleation and transformation of phases is discussed.
R. S. Mishra et al., "Preparation of a ZrO₂-Al₂O₃ Nanocomposite by High-Pressure Sintering of Spray-Pyrolyzed Powders," Journal of Materials Research, Materials Research Society, Mar 1999.
The definitive version is available at http://dx.doi.org/10.1557/JMR.1999.0111
Materials Science and Engineering
India. Department of Science and Technology
National Science Foundation (U.S.)
United States. Department of Energy
Keywords and Phrases
Aluminium Oxide; Spray-Pyrolyzed Powders; Zirconium Dioxide Baddeleyite
Article - Journal
© 1999 Materials Research Society, All rights reserved.