期刊
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
卷 32, 期 2, 页码 399-412出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2008.03.003
关键词
thermodynamic modeling; Y2O3-Al2O3-SiO2; liquid model; CEF
Phase equilibria and thermodynamic properties at I bar in the Y2O3-Al2O3-SiO2 ternary system and its constituent binaries Y2O3-Al2O3 and Y2O3-SiO2 have been reevaluated using the CALPHAD approach. The liquid phase is described by the ionic two-sublattice model with the formula (Al+3, Y+3)(p)(AlO2-1, O-2, SiO4-4, SiO4-4, SiO20)(Q). The SiO2 solubility in the YAM phase was described using a Compound energy model. Two clatasets of self-consistent model parameters are presented. However, the rather meagre and scattered experimental data imply that the present assessments should be regarded as provisional. Some critical experiments are suggested for this system. (C) 2008 Elsevier Ltd. All rights reserved.
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