Thermodynamic re-assessment of the Fe-Dy and Fe-Tb binary systems
Thermodynamic re-assessment of the Fe-Dy and Fe-Tb binary systems
复制标题
Fe-Dy 和 Fe-Tb 二元系统的热力学重新评估
DOI：
10.1016/j.calphad.2017.10.003
复制
发表时间：
2017-12-01
影响因子：
2.4
通讯作者：
Zhou, H. Y.
中科院分区：
文献类型：
--
作者：
Rong, M. H.;Chen, X. L.;Zhou, H. Y.
In this work, based on the critical evaluation of previous optimizations and available experimental data in the published literature, the Fe-Dy and Fe-Tb binary systems were re-assessed thermodynamically using the CALPHAD method. The solution phases including liquid, fcc-Fe, bcc-Fe, bcc-Dy, bcc-Tb, hcp-Dy and hcp-Tb, were described by the substitutional solution model and their excess Gibbs energies were expressed with the Redlich-Kister polynomial. Due to their narrow homogeneity ranges, the intermetallic compounds, Fe17Dy2, Fe23Dy6, Fe3Dy, Fe2Dy, Fe17Tb2, Fe23Tb6, Fe3Tb and Fe2Tb, were modeled as stoichiometric compounds. Self-consistent thermodynamic parameters to describe the Gibbs energies of various phases in the Fe-Dy and Fe-Tb binary systems were obtained finally. The calculated results are in good agreement with the reported phase equilibria and thermodynamic properties.
