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Equilibria of nitride forming reactions in liquid iron alloys

  • Physical Chemistry
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Abstract

Published thermodynamic data on the nitride forming reactions in liquid iron alloys containing Al, B, Nb, Ta, Ti, V, and Zr are critically reviewed. New data on vanadium nitride dissolution-formation reaction in liquid Fe−V alloys were obtained by the sampling method. The reaction investigated and the corresponding change in the standard Gibbs energy, ΔG oT , are as follows:\(VN(s) = \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{V} + \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{N} \), for which ΔG oT =167−0.0837T±1.5 (kJ/mol) (1873 to 1973 K). A series of possible nitride forming reactions in liquid iron alloys are discussed in terms of the standard Gibbs energy and enthalpy of formation of nitrides, atomic numbers of nitride forming elements, and interaction parameters.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Faculty of Engineering, Osaka University, Suita, Osaka, Japan

    Z. Morita (Professor) & T. Tanaka (Research Associate)

  2. Musashi Works, Hitachi Ltd., Kodaira, Tokyo, Japan

    T. Yanai

Authors
  1. Z. Morita
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  2. T. Tanaka
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  3. T. Yanai
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Additional information

T. YANAI, formerly Graduate Student of Osaka University

This paper is based on a presentation made at the G.R. Fitterer Symposium on Nitrogen in Metals and Alloys held at the 114th annual AIME meeting in New York, February 24–28, 1985, under the auspices of the ASM-MSD Thermodynamic Activity Committee.

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Morita, Z., Tanaka, T. & Yanai, T. Equilibria of nitride forming reactions in liquid iron alloys. Metall Trans B 18, 195–202 (1987). https://doi.org/10.1007/BF02658444

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