Thermodynamic Interactions of Nb and Mo on Ti in Liquid Iron

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  • Chung Tae-In
    Department of Metallurgical and Materials Engineering, Hanyang University
  • Lee Joong-Beom
    Department of Metallurgical and Materials Engineering, Hanyang University
  • Kang Jin-Goo
    Department of Metallurgical and Materials Engineering, Hanyang University
  • Jo Jong-Oh
    Department of Metallurgical and Materials Engineering, Hanyang University
  • Kim Bo-Ho
    Department of Metallurgical and Materials Engineering, Hanyang University
  • Pak Jong-Jin
    Department of Metallurgical and Materials Engineering, Hanyang University

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Abstract

Thermodynamic interactions of niobium and molybdenum on titanium in liquid iron were studied in the temperature range of 1873∼1973 K by measuring the effects of niobium and molybdenum on the solubility product for TiN formation in liquid iron using the metal-nitride-gas equilibration technique. The experimental results were thermodynamically analyzed using Wagner’s interaction parameter formalism to determine the first-order interaction parameters of niobium and molybdenum on titanium in liquid iron as 0.0495±0.0049 and 0.01±0.0026, respectively, at 1873 K. Temperature dependence of these parameters was also determined as follows. e_Ti^Nb = 1160/T - 0.570, e_Ti^Mo = 0.01 (1873∼1973 K)

Journal

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 49 (4), 854-859, 2008

    The Japan Institute of Metals and Materials

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