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Reactive interdiffusion: deviation from local equilibrium in the Fe-NiTiO3 couple

Jacob, KT and Rajithaa, G and Reddy, SNS (2010) Reactive interdiffusion: deviation from local equilibrium in the Fe-NiTiO3 couple. In: Scripta Materialia, 63 (2). pp. 204-206.

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Official URL: http://dx.doi.org/10.1016/j.scriptamat.2010.03.053

Abstract

Deviation from local equilibrium between Fe–Ni alloy and (Fe,Ni)TiO3 solid solution in the reaction–diffusion zone of the Fe–NiTiO3 couple at 1273 K is evaluated by comparing the measured compositions in the zone with experimentally determined equilibrium tie-lines. The deviation is quantified by computing the Gibbs energy change for the reaction, Fe + NiTiO3 → FeTiO3 + Ni, from measured compositions in the zone and activity data available in the literature. Except near the extremities of the zone, the computed Gibbs energy change is constant, 8.2 kJ mol−1 higher than the standard Gibbs energy change for the reaction.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Diffusion;Thermodynamics;Phase diagram;Oxides
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 29 Dec 2011 05:24
Last Modified: 29 Dec 2011 05:24
URI: http://eprints.iisc.ernet.in/id/eprint/42761

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