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Atomic Structure Determination of Nio-Y2O3 Interfaces by HRTEM

Published online by Cambridge University Press:  02 July 2020

E.C. Dickey  and
V.P. Dravid
E.C. Dickey
Affiliation:
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506
V.P. Dravid
Affiliation:
Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208
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Extract

The investigation of interfaces between NiO and Y2O3 is part of a research initiative to understand low-energy heterophase interface structures between different oxide materials. In-situ oxide composites formed by the directional solidification of pseudo-binary eutectics are used as model materials in this study because they are amenable to chemical and structural characterization at the atomic length-scale. Previously, interfaces in NiO-ZrO2(cubic) directionally solidified eutectics (DSEs) were examined by various electron imaging and spectroscopy techniques to reveal the three-dimensional interface structure.[l] The second DSE system studied, NiO-Y2O3,[2] was chosen because it is very similar in crystallography to NiO-ZrO2(cubic). The goal of this second, analogous study is not only to understand the NiO-Y2O3 interface structure but, by comparing the results to NiO-ZrO2, is to draw more general conclusions about low energy oxide-oxide interfaces. Table one compares the crystallography of the NiO-ZrO2 and the NiO-Y2O3 DSEs.

Type
Atomic Structure and Mechanisms at Interfaces in Materials
Information
Microscopy and Microanalysis , Volume 3 , Issue S2: Proceedings: Microscopy & Microanalysis '97, Microscopy Society of America 55th Annual Meeting, Microbeam Analysis Society 31st Annual Meeting, Histochemical Society 48th Annual Meeting, Cleveland, Ohio, August 10-14, 1997 , August 1997 , pp. 649 - 650
Copyright
Copyright © Microscopy Society of America 1997

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References

Dickey, E.C., Dravid, V.P., Neilist, P., Wallis, D.J., Pennycook, S.J., “ Three-Dimensional Atomic Structure of NiO-ZrO2(cubic) Interfaces,” submitted to Acta Materialia.Google Scholar
Fragneau, M., Revcolevschi, A., “Crystallography of Directionally Solidified NiO-Y2O3 Eutectic,” J. Am Ceram. Soc. (1982) C-102.10.1111/j.1151-2916.1982.tb10474.xCrossRefGoogle Scholar