Magnesium Deoxidation Equilibrium of Molten Fe–Cr–Ni Alloy Expressed by Quadratic Formalism and Redlich-Kister Type Polynomial

Ryo Yamamoto; Hiroshi Fukaya; Naoya Satoh; Takahiro Miki; Mitsutaka Hino

doi:10.2355/isijinternational.51.895

Regular Article

Magnesium Deoxidation Equilibrium of Molten Fe–Cr–Ni Alloy Expressed by Quadratic Formalism and Redlich-Kister Type Polynomial

Ryo Yamamoto, Hiroshi Fukaya, Naoya Satoh, Takahiro Miki, Mitsutaka Hino

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Keywords: quadratic formalism, thermodynamics, activity, excess free Gibbs energy, Redlich-Kister polynomial, magnesium deoxidation equilibrium, iron, chromium, nickel

JOURNAL FREE ACCESS

2011 Volume 51 Issue 6 Pages 895-900

DOI https://doi.org/10.2355/isijinternational.51.895

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Abstract

Magnesium deoxidation equilibrium of molten Fe–Cr–Ni alloy was determined by a chemical equilibrium method at temperature of 1873 to 1973 K. Extreme care was taken of oxygen analysis of the samples. Numerical analysis on Mg deoxidation of molten Fe–Cr–Ni alloy has been carried out by utilizing the model based on Darken's quadratic formalism and Redlich-Kister type polynomial. Magnesium deoxidation equilibrium can be expressed in wide composition region of the Fe–Cr–Ni alloy.

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