Oxidation of CoO into Co{sub 3}O{sub 4} in CoO-ZrO{sub 2}(CaO) and Co{sub 1{minus}x}Ni{sub x}O-ZrO{sub 2}(CaO) lamellar eutectic structures

Conference · Fri Sep 01 00:00:00 EDT 1995

OSTI ID:94075

Lafleurielle, M; Dhalenne, G; Millot, F; Revcolevschi, A ^[1]

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1. URA 446, Orsay (France). Thermodynamique et Physico-Chimie des Materiaus

Unidirectional solidification experiments were carried out at the eutectic composition of the systems CoO-ZrO{sub 2}(CaO) and Co{sub 1{minus}x}Ni{sub x}O-ZrO{sub 2}(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 Co{sub 3}O{sub 4}. The study of partially oxidized samples shows that Co{sub 3}O{sub 4} is formed by two mechanisms which are presented together with the corresponding kinetics.

• OSTI ID: 94075
• Report Number(s): CONF-941144-; ISBN 1-55899-258-8; TRN: 95:018728
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 28 Nov - 9 Dec 1994; Other Information: PBD: 1995; Related Information: Is Part Of Structure and properties of interfaces in ceramics; Bonnell, D. [ed.] [Univ. of Pennsylvania, PA (United States)]; Ruehle, M. [ed.] [Max-Planck-Institut fuer Metallforschung, Stuttgart (Germany)]; Chowdhry, U. [ed.] [E.I. duPont de Nemours and Co., Inc., Wilmington, DE (United States)]; PB: 481 p.; Materials Research Society symposium proceedings, Volume 357
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
MICROSTRUCTURE
COBALT OXIDES
OXIDATION
NICKEL OXIDES
ZIRCONIUM OXIDES
CALCIUM OXIDES
HEAT TREATMENTS
OXYGEN
MONOCRYSTALS
SOLID SOLUTIONS
INTERFACES
REACTION KINETICS
ELECTRON MICROPROBE ANALYSIS