Kinetics of Pressureless Infiltration of Al-Mg Melts into Porous Alumina Preforms

Patro, Debdutt and Jayaram, Vikram (2008) Kinetics of Pressureless Infiltration of Al-Mg Melts into Porous Alumina Preforms. In: Metallurgical and Materials Transactions B, 39 (1). pp. 108-115.

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Abstract

Effective “hydrodynamic” radii governing infiltration kinetics of reactive Al-Mg melts into alumina preforms were found to be three orders of magnitude smaller than the average pore size of the packed bed and also smaller compared with the kinetics for a nonreactive system. A sinusoidal capillary model was developed to predict flow kinetics within the packed bed. For the reactive system, two factors were ascribed for additional melt retardation: (1) different intrinsic wettabilities of the two liquids on alumina, thereby leading to significantly different “effective” local contact angles; and (2) local solute depletion from the meniscus, which was incorporated as a time-dependent contact angle.

Item Type:	Journal Article
Publication:	Metallurgical and Materials Transactions B
Publisher:	The Minerals, Metals & Materials Society
Additional Information:	Copyright of this article belongs to The Minerals, Metals & Materials Society.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	24 Mar 2010 07:21
Last Modified:	19 Sep 2010 05:58
URI:	http://eprints.iisc.ac.in/id/eprint/26494

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