Title: A phase field model for isothermal crystallization of oxide melts
Authors: Heulens, Jeroen ×
Blanpain, Bart
Moelans, Nele #
Issue Date: Mar-2011
Publisher: Elsevier Science
Series Title: Acta Materialia vol:59 issue:5 pages:2156-2165
Abstract: We present a multicomponent multi-phase field model for isothermal crystallization of oxide melts. The bulk thermodynamic properties of the liquid as a function of composition are retrieved from the FACT thermodynamic database for oxide systems. For solid phases modeled as stoichiometric in the thermodynamic database, a paraboloid Gibbs energy is introduced with specific constraints to ensure correct phase equilibria and minimal solubility in the stoichiometric phase. The interfacial mobility can show strong anisotropy and the interfacial energy can have weak anisotropy, since both faceted and dendritic growth morphologies are important for crystallization in oxide systems. The possibilities of the model are illustrated with three case studies considering crystallizing and dissolving solid phases in a CaO-Al2O3-SiO2 melt. These case studies show the influence of the diffusion mobilities on the diffusion path, the tie-line selection in a ternary system and the effect of the surface energy on dendritic growth. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
ISSN: 1359-6454
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Chemical and Extractive Metallurgy Section (-)
× corresponding author
# (joint) last author

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