Microanalysis of an oxidized cobalt oxide: Zirconia eutectic

Conference · Fri Dec 31 00:00:00 EST 1993

OSTI ID:10127720

Bentley, J ^[1]; McKernan, S; Carter, C B ^[2]; Revcolevschi, A ^[3]

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1. Oak Ridge National Lab., TN (United States)
2. Minnesota Univ., Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
3. Laboratoire de Chimie des Solides, Universite de Paris-Sud, Batiment, Orsay Cedex (France)

The compositions of CoO, Co{sub 3}O{sub 4}, and Ca-stabilized cubic ZrO{sub 2} in an oxidized directionally solidified CoO-ZrO{sub 2} eutectic were determined by PEELS and EDS. An oxygen gradient exists across the Co{sub 3}O{sub 4} with highest levels near the ZrO{sub 2} interface. Oxygen ELNES for CoO and Co{sub 3}O{sub 4} are quite different; published oxygen ELNES have been incorrectly attributed to CoO. Normalized Co-L{sub 23} white line intensity (WLI) ratios for CoO and Co{sub 3}O{sub 4} are similar (0.53 {plus_minus} 0.02) but L{sub 3}/L{sub 2} WLI ratios are 3.88 and 2.58, respectively. ELCE data suggest Co{sub 3}O{sub 4} has the inverse spinel structure.

• Research Organization: Oak Ridge National Lab., TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10127720
• Report Number(s): CONF-930956-2; ON: DE94007209; CNN: Grant DMR-8901218
• Resource Relation: Conference: Biennial conference of the Electron Microscopy and Analysis Group of the Institute of Physics: recent advances in electron microscopy and related microanalytical techniques,Liverpool (United Kingdom),14-17 Sep 1993; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ZIRCONIUM OXIDES
STRUCTURAL CHEMICAL ANALYSIS
COBALT OXIDES
EUTECTICS
BINARY MIXTURES
ENERGY-LOSS SPECTROSCOPY
X-RAY SPECTROSCOPY
CHEMICAL COMPOSITION
360202
STRUCTURE AND PHASE STUDIES