Haldar, Manas Kamal and Banerjee, Goutam (2003) Properties of zirconia-mullite composites prepared from beach sand sillimanite. Materials Letters, 57 (22-23). pp. 3513-3520. ISSN 0167-577X

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Abstract

Zirconia-mullite composites were prepared from beach sand sillimanite in the presence of magnesia as an additive. The raw materials were attrition milled. Samples were isostatically pressed and sintered in the temperature range of 1500-1600 degreesC with 2 h of soaking. The resulting composites were characterized in terms of densification, thermal expansion, martensite start (M-s) temperature. The presence of magnesia changes the value of thermal expansion coefficient. The mechanical and thermomechanical properties, namely flexural strength and thermal spalling of the sintered composites, were characterized and effect of magnesia on it is discussed. The microstructural characterization of the sintered samples through scanning electron microscopy has shown that mullite and zirconia are the two major phases in the microstructure. (C) 2003 Elsevier Science B.V. All rights reserved.

Item Type:	Article
Uncontrolled Keywords:	Milling; Firing; X-ray methods; Thermal expansion; Mullite
Subjects:	Refractories
Divisions:	UNSPECIFIED
Depositing User:	Subhra Lahiri
Date Deposited:	21 Feb 2012 09:54
Last Modified:	21 Feb 2012 09:54
URI:	http://cgcri.csircentral.net/id/eprint/886

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