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Oxidation of Coo Into Co3O4 in CoO-ZrO2(CaO) and Co1-xNixO-ZrO2(CaO) Lamellar Eutectic Structures

Published online by Cambridge University Press:  15 February 2011

M. Lafleurielle ,
G. Dhalenne ,
F. Millot  and
A. Revcolevschi
M. Lafleurielle
Affiliation:
URA 446, “thermodynamique et physico-chimie des matériaux”, bâtiment 414, 91405 Orsay, Cedex-France
G. Dhalenne
Affiliation:
URA 446, “thermodynamique et physico-chimie des matériaux”, bâtiment 414, 91405 Orsay, Cedex-France
F. Millot
Affiliation:
URA 446, “thermodynamique et physico-chimie des matériaux”, bâtiment 414, 91405 Orsay, Cedex-France
A. Revcolevschi
Affiliation:
URA 446, “thermodynamique et physico-chimie des matériaux”, bâtiment 414, 91405 Orsay, Cedex-France
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Abstract

Unidirectional solidification experiments were carried out at the eutectic composition of the systems CoO-ZrO2(CaO) and Co1-xNixO-ZrO2(CaO) yielding materials made of regularly aligned lamellar structures. These eutectic samples were submitted to a high temperature chemical oxidation treatment under oxygen, in conditions where CoO should be oxidized into Co3O4. The study of partially oxidized samples shows that Co3O4 is formed by two mechanisms which are presented together with the corresponding kinetics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 357: Symposium C – Structure and Properties of Interfaces in Ceramics , 1994 , 343
Copyright
Copyright © Materials Research Society 1995

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