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Combustion Synthesis and Properties of Zirconia-Alumina Powders

Dhas, Arul N and Patil, KC (1994) Combustion Synthesis and Properties of Zirconia-Alumina Powders. In: Ceramics International, 20 (1). pp. 57-66.

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Abstract

Fine zlrconia-alumina composite powders with 10-80% $ZrO_2$ have been prepared by the combustion of aqueous solutions containing stoichiometric amounts of aluminium nitrate, zirconyl nitrate and carbohydrazide. The combustion-derived powders are of submicron size, with 40--65 $m^2/g$ BET surface area. The cold-pressed powders, when sintered at 1650°C for 3 h achieved 94-99% theoretical density. The sintered body of 10% $t-ZrO_2-AI_20_3$ has room-temperature Vickers hardness, Hv = 21.1 GPa and fracture toughness, $K_e=8.9MPa\hspace{2mm}m^{1/2}$.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 07 Oct 2006
Last Modified: 19 Sep 2010 04:30
URI: http://eprints.iisc.ernet.in/id/eprint/8205

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