Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5452864 | Calphad | 2017 | 9 Pages |
Abstract
The Fe-Gd and Fe-Sm binary systems were re-assessed thermodynamically using the CALPHAD method based on the critical evaluation of previous optimizations and available experimental information in the published literature. The solution phases including liquid, fcc-Fe, bcc-Fe, bcc-Gd, hcp-Gd, bcc-Sm, hcp-Sm and rhombohedral-Sm, were described by the substitutional solution model and their excess Gibbs energies were expressed with the Redlich-Kister polynomial. The intermetallic compounds, α-Fe17Gd2, β-Fe17Gd2, Fe23Gd6, Fe3Gd, Fe2Gd, Fe17Sm2, Fe3Sm and Fe2Sm, were modeled as stoichiometric compounds due to their narrow homogeneity ranges. Self-consistent thermodynamic parameters to describe Gibbs energies of various phases in the Fe-Gd and Fe-Sm binary systems were obtained finally. The calculated results in this work are in good agreement with the reported phase equilibria and thermodynamic properties.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
X.L. Chen, J. Wang, T.L. Chen, X.D. Lin, M.H. Rong, G.H. Rao, H.Y. Zhou,