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Solubility and activity of oxygen in liquid nickel in equilibrium with $\alpha -Al_2o_3$Nio.(1 + x)$Al_2o_3$

Jacob, KT (1986) Solubility and activity of oxygen in liquid nickel in equilibrium with $\alpha -Al_2o_3$Nio.(1 + x)$Al_2o_3$. In: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, 17B (4). pp. 763-70.

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Abstract

The limiting solubility of o in liquid Ni in equilibrium with $\alpha$-alumina and Ni aluminate was measured by using inert gas fusion analysis of suction samples at 1730-1975 K. The corresponding o potential was monitored by a solid electrolyte cell consisting of calcia stabilized zirconia as the electrolyte and $Mo + Moo_2$ as the reference electrode. From simultaneous measurements of the potential and concentration of o in melts, not in thermodynamics equilibrium with alumina and aluminate phases, information on the compositiion dependence of the activity coefficient and standard free energy of solution of O is obtained. The O solubility in liquid Ni in equilibrium with solid NiO, evaluated from thermodynamics data, is compared with information reported in the literature. Implications of the results to deoxidation equilibria of Al in Ni are discussed.

Item Type: Journal Article
Additional Information: Copyright to this article belongs to Springer
Keywords: Solubility;nickel;quilibrium;lumina;nickel aluminate
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 04 Jul 2008
Last Modified: 27 Aug 2008 13:32
URI: http://eprints.iisc.ernet.in/id/eprint/14791

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