期刊
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
卷 35, 期 4, 页码 533-541出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.calphad.2011.09.002
关键词
C-La system; C-Ce system; C-Pr system; Phase diagram; Thermodynamic modeling
类别
资金
- Creative Research Group of National Natural Science Foundation of China [51028101]
- National Natural Science Foundation of China [50971135]
- Alexander von Humboldt Foundation of Germany
The phase diagrams and thermodynamic properties of the C-RE (RE = La, Ce and Pr) binary systems were assessed by using the CALPHAD method applied to the experimental data in the literature. In the C-RE (RE = La, Pr) systems, RE2C3 and beta REC2 (high-temperature form of REC2 phase) were modeled as non-stoichiometric phases while alpha REC2 (low-temperature form of REC2 phase) was considered to be stoichiometric phase. For La2C3 phase, enthalpy increment (H-T-H-298K) information was also considered in the optimization. Due to their negligible homogeneities, intermediate compounds Ce2C3 and CeC2 in the C-Ce system, were treated as stoichiometric phases. One set of self-consistent thermodynamic parameters was finally obtained for each of these binary systems. Comparisons between calculated and measured phase diagrams as well as thermodynamic properties showed that most of the experimental information can be satisfactorily accounted for by the present thermodynamic descriptions. (C) 2011 Elsevier Ltd. All rights reserved.
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