Thermodynamic Modeling of the Isomorphous Phase Diagrams in the Al2O3-Cr2O3 and V2O3-Cr2O3 Systems

Autor:	Sung S. Kim, Thomas H. Jr. Sanders
Rok vydání:	2004
Předmět:	Spinodal Spinodal decomposition Chemistry Regular solution Thermodynamics Liquidus Solidus Gibbs free energy symbols.namesake Linear regression Materials Chemistry Ceramics and Composites symbols Phase diagram
Zdroj:	Journal of the American Ceramic Society. 84:1881-1884
ISSN:	1551-2916 0002-7820
DOI:	10.1111/j.1151-2916.2001.tb00930.x
Popis:	The phase diagrams in the Al 2 O 3 -Cr 2 O 3 and V 2 O 3 -Cr 2 O 3 systems have been assessed by thermodynamic modeling with existing data from the literature. While the regular and subregular solution models were used in the Al 2 O 3 -Cr 2 O 3 system to represent the Gibbs free energies of the liquid and solid phases, respectively, the regular solution model was applied to both phases in the V 2 O 3 -Cr 2 O 3 system. By using the liquidus, solidus, and/or miscibility gap data, the interaction parameters of the liquid and solid phases were optimized through a multiple linear regression method. The phase diagrams calculated from these models are in good agreement with experimental data. Also, the solid miscibility gap and chemical spinodal in the V 2 O 3 -Cr 2 O 3 system were estimated.
Databáze:	OpenAIRE
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