OXYGEN SOLUBILITY IN A NIOBIUM-CONTAINING Fe – Ni MELTS
https://doi.org/10.17073/0368-0797-2014-7-10-16
Abstract
The oxygen solubility in the niobium-containing ironnickel melts has been experimentally studied at 1823 K using the Fe – 40 % Ni alloy as an example. It was shown that niobium decreases the oxygen solubility in this melt. The equilibrium constant of interaction of niobium and oxygen dissolved in the Fe – 40 % Ni melt (lgK(1) (Fe – 40 % Ni) = –4.619), the Gibbs energy of this reaction ( = 161,210 J/mol), and the interaction parameters characterizing these solutions ( = –0.630; = –0.105; = 0.010) were determined. The equilibrium constant of interaction of niobium and oxygen dissolved in the Fe – Ni melts, the Gibbs energy of reaction of niobium and oxygen interaction, and the interaction parameterscharacterizing these solutions were calculated in a wide range of concentrations at 1823 K. Oxygen solubility in the various compositions niobium-containing Fe – Ni melts was determined at 1823 K. With an increase of the nickel content in melt the affinity of niobium to oxygen increases substantially. This is due to the fact that, when the nickel content in melt increases, the bond strengths of oxygen with the melt base weakens
About the Authors
A. A. Aleksandrov
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Leninskii pr., 49, 119991, Moscow, Russia)
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Senior Researcher
V. Ya. Dashevskii
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Leninskii pr., 49, 119991, Moscow, Russia)
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Chair “Extraction and Recycling of Ferrous Metals”
G. S. Sprygin
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Leninskii pr., 49, 119991, Moscow, Russia)
Russian Federation
Acting Junior Researcher
Russian Federation
Acting Junior Researcher
L. I. Leont’ev
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences (Leninskii pr., 49, 119991, Moscow, Russia)
Russian Federation
Dr. Sci. (Eng.), Professor
Russian Federation
Dr. Sci. (Eng.), Professor
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Review
For citations:
Aleksandrov A.A., Dashevskii V.Ya., Sprygin G.S., Leont’ev L.I. OXYGEN SOLUBILITY IN A NIOBIUM-CONTAINING Fe – Ni MELTS. Izvestiya. Ferrous Metallurgy. 2014;57(7):10-16. (In Russ.) https://doi.org/10.17073/0368-0797-2014-7-10-16
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