Analysis of the Glass-Forming Ability of Fe–Er Alloys, Based on Thermodynamic Modeling


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Abstract

The Fe–Er phase diagram and thermodynamic properties of all its phases are assessed by means of self-consistent analysis. To refine the data on phase equilibria in the Fe–Er system, an investigation is performed in the 10–40 at % range of Er concentrations. The temperature–concentration dependences of the thermodynamic properties of a melt are presented using the model of ideal associated solutions. Thermodynamic parameters of each phase are obtained, and the calculated results are in agreement with available experimental data. The correlation between the thermodynamic properties of liquid Fe–Er alloys and their tendency toward amorphization are studied. It is shown that compositions of amorphous alloys prepared by melt quenching coincide with the ranges of concentration with the predominance of Fe3Er and FeEr2 associative groups that have large negative entropies of formation.

About the authors

N. A. Arutyunyan

Department of Chemistry

Author for correspondence.
Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 119991

A. I. Zaitsev

Department of Chemistry; Bardin Central Research Institute of Ferrous Metals

Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 119991; Moscow, 107005

S. F. Dunaev

Department of Chemistry

Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 119991

K. B. Kalmykov

Department of Chemistry

Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 119991

D. D. El’nyakov

Department of Chemistry

Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 119991

N. G. Shaposhnikov

Bardin Central Research Institute of Ferrous Metals

Email: naarutyunyan@gmail.com
Russian Federation, Moscow, 107005

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