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Three phase equilibria for activity determinations: system Co Mn

Jacob, KT and Iwase, M (1982) Three phase equilibria for activity determinations: system Co Mn. In: Zeitschrift fur Metallkunde, 73 (5). pp. 316-320.

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Abstract

A solid state e.m.f. cell with yttria-doped thoria as the electrolyte and a mixture of Cr + Cr sub 2 O sub 3 as the reference electrode, was employed for the measurement of the activity of manganese in the Co--Mn system at 1760 deg K, for 0.3 > X sub Mn > 0.05. The liquid alloy was contained in an alumina crucible and saturated with MnAl sub 2+2x O sub 4+3x . The cell can be represented by Pt, W, (Co--Mn) + MnAl sub 2+2x O sub 4+3x + Al sub 2 O sub 3 /ThO sub 2 --Y sub 2 O sub 3 /Cr + Cr sub 2 O sub 3 , Pt. The activity of manganese shows negative deviations from Raoult's law. The activities in the Co--Mn system are intermediate between those in the Fe--Mn and Ni--Mn systems. The Gibbs' energies of mixing in these systems follow the trends given by Miedema's model. 14 ref.--AA.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Carl Hanser Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 05 Dec 2011 07:09
Last Modified: 05 Dec 2011 07:09
URI: http://eprints.iisc.ernet.in/id/eprint/42560

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