ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Ti Deoxidation Equilibrium in Molten Fe–Ni Alloys at Temperatures between 1823 to 1923 K
Seong-Ho SeokTakahiro MikiMitsutaka Hino
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2009 Volume 49 Issue 6 Pages 804-808


Equilibrium relation between Ti and O in molten Fe–Ni alloy has been investigated at 1873 to 1923 K. Ti oxide equilibrated with molten Fe–Ni alloy has been determined by EBSD (Electron Backscatter Diffraction) pattern analysis using FE-SEM (Field Emission Scanning Electron Microscope). The present results have been numerically analyzed by the excess Gibbs free energy change of mixing for the Fe–Ni–Ti–O system with Redlich–Kister type polynomial. Redlich–Kister type polynomial parameters concerning Ni and Ti were determined as follows,
0ΩNi–Ti = 424280−270.40T J/mol (XTi<0.003, 1823 K≤T≤1923 K),
1ΩNi–Ti = −663380+313.15T J/mol (XTi<0.003, 1823 K≤T≤1923 K).

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© 2009 by The Iron and Steel Institute of Japan
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