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The phase diagram of the Fe-Zn binary system was evaluated based on the CALPHAD method with reference to the latest experimental data. The solubility ranges of the intermetallic compound (IMC) phases, Γ-Fe4Zn9, Γ1-Fe11Zn40, δ1k-FeZn7, δ1p- Fe13Zn126, and ζ-FeZn13 were modeled considering their structures consisting of Zn12 icosahedra with Fe at the center (Fe1Zn12 clusters) as well as glue-like Fe and Zn atoms, and the miscibility gap between the δ1k and δ1p phases was also taken into account in the present calculations. The solubility of Fe in the liquid and (ηZn) phases that was confirmed as dozens of times larger than the values reported in the earlier literature could be calculated by introducing Fe1Zn12 associates to these solution phases. Consequently, all phase equilibria were adequately reproduced by the thermodynamic models and parameters revised in the present study.

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  This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s11669-024-01110-1

Keyword: CALPHAD, phase equilibria, hot-dip galvanizing, thermodynamics

Date published: 2024-05-05

Publisher: Springer Science and Business Media LLC

Journal:

• Journal of Phase Equilibria and Diffusion (ISSN: 15477037) vol. 45 p. 537-546

Funding:

• JSPS 21H01676 (構造材料の結晶粒界・転位偏析計算システムの構築と偏析デザインによる組織制御)

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5229

First published URL: https://doi.org/10.1007/s11669-024-01110-1

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Updated at: 2025-05-05 08:30:07 +0900

Published on MDR: 2025-05-05 08:19:03 +0900