Aluminum deoxidation equilibrium of molten Fe-Ni alloy coexisting with alumina or hercynite

Atsutaka Hayashi, Takayuki Uenishi, Hirotoshi Kandori, Takahiro Miki, Mitsutaka Hino

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Aluminum deoxidation equilibrium of molten Fe-Ni alloy was determined by chemical equilibrium method at temperature of 1873 to 1973 K. Also, critical point in molten Fe-40mass%Ni alloy that coexisted with AI 2O 3 and FeO. AI 2O 3 was determined experimentally at 1973 K. Solvent extraction method was applied to improve the analytical accuracy of the low aluminum content in molten Fe-Ni alloy. The relation between aluminum and oxygen contents in molten Fe-Ni alloy equilibrated with AI 2O 3 or FeO. AI 2O 3 was estimated in the whole alloy composition range at 1873 to 1973 K by utilizing the metallic solution model based on Darken's quadratic formalism and Redlich-Kister type polynomial.

Original languageEnglish
Pages (from-to)1533-1541
Number of pages9
JournalIsij International
Volume48
Issue number11
DOIs
Publication statusPublished - 2008 Dec 1

Keywords

  • Activity
  • Alumina
  • Aluminum deoxidation equilibrium
  • Excess free Gibbs energy
  • Hercynite
  • Iron
  • Iron-nickel alloy
  • Nickel
  • Quadratic formalism
  • Redlich-Kister polynomial
  • Thermodynamics

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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