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Combustion synthesis and properties of mullite-zirconia composites

Gopi Chandran, R and Patil, KC and Chandrappa, GT (1996) Combustion synthesis and properties of mullite-zirconia composites. In: Journal of Materials Science, 31 (21). pp. 5773-5779.

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Abstract

Mullite-zirconia composite powders were prepared by the combustion of an aqueous heterogeneous redox mixture consisting of $AI(NO_3)_3, Zr(NO_3)_4/ZrO(NO_3)_2$, silica fume and urea/diformyl hydrazine at $500^o C$. X-ray diffraction data showed that a large amount of tetragonal zirconia existed in the composite powders in spite of high temperature calcination. Milled composite powders showed enhanced densification compared to the unmilled powders and the microstructure of the sintered $(1600^o)$ compacts showed the presence of spherical zirconia grains in intergranular positions along with elongated mullite grains.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Springer.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 29 May 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ernet.in/id/eprint/10082

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