Preparation of a $ZrO_{2}-Al_{2}O_{3}$ nanocomposite by high-pressure sintering of spray-pyrolyzed powders

Mishra, RS and Jayaram, V and Majumdar, B and Lesher, CE and Mukherjee, AK (1999) Preparation of a $ZrO_{2}-Al_{2}O_{3}$ nanocomposite by high-pressure sintering of spray-pyrolyzed powders. In: Journal of Materials Research, 14 (3). pp. 834-840.

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Abstract

$ZrO_{2}-Al_{2}O_{3}$ 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 $ZrO_{2}$ reduces from ~1050 to 700Ç800 ÉC range. It was possible to ob-tain highly-dense nanocrystalline $ZrO_{2}-Al_{2}O_{3}$ composite at temperatures as low as 700 ÉC. The effect of high pressure on nucleation and transformation of phases is discussed.

Item Type:	Journal Article
Publication:	Journal of Materials Research
Publisher:	Materials Research Society
Additional Information:	Copyright for this article belongs to Materials Research Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	20 Jul 2005
Last Modified:	26 May 2011 07:25
URI:	http://eprints.iisc.ac.in/id/eprint/2927

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