Roy, Sujit Kumar and Ghosh, S K and Ghosh, A and Ramanathan, S (2005) Microstructure characterization and thermal expansion behaviour of interpenetrating alumina/aluminium composites. Transactions of the Indian Ceramic Society, 64 (3). pp. 137-142. ISSN 0371-750X

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Abstract

Interpenetrating phase composites (IPCs) are a new class of composite materials in which at least two of the constituent phases are three-dimensionally continuous. Such interconnected microstructures suggest improved combination of properties and increased damage tolerance. However, identifying those microstructures has been a difficult task. Interpenetrating phase Alumina/Aluminium composites were fabricated by a displacement reaction between solid silica glass rods and molten aluminium. The composite microstructures were characterized in terms of grain size and contiguity to evaluate the distribution and connectivity of the Al2O3 and Al phases. The thermal expansion response of these composites was studied. Coefficients of thermal expansion (CTEs) were observed to vary significantly with temperature and displayed non-linear behaviour. It is thought that this indicates an influence of the interconnectivity of the metal phase mainly. Comparisons are made with well-known methods for predicting CTEs of ceramic/metal composites.

Item Type:	Article
Subjects:	Microstructure and Characterization Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	20 Mar 2012 11:55
Last Modified:	17 Apr 2015 06:54
URI:	http://cgcri.csircentral.net/id/eprint/1293

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