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L12- and L10-like cation-ordered structures in ZrO2–Y2O3 ceramics

Published online by Cambridge University Press:  31 January 2011

J. C. Rao ,
Y. Zhou  and
D. X. Li
J. C. Rao*
Affiliation:
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China and Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
Y. Zhou
Affiliation:
School of Materials Science and Engineering, Harbin 15001, People's Republic of China
D. X. Li
Affiliation:
Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, People's Republic of China
*
a)All correspondence should be addressed to this author. e-mial: [email protected] or [email protected]
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Abstract

Y0.25Zr0.75O2−x and Y0.5Zr0.5O2−y phases, with L12- and L10- like cation-ordered structures, respectively, have been found in ZrO2–Y2O3 ceramics in both the sintered and annealed states. High-resolution electron microscopy, energy-dispersive x-ray spectroscopy and computer simulation have been used to reveal the presence of the phases. The formation of Y0.25Zr0.75O2−x and Y0.5Zr0.5O2−y phases was initiated during the sintering procedure and developed with the increase in annealing temperature and time. Segregation of yttrium, which was prevalent in different regions even within one grain, induced the formation of Y0.25Zr0.75O2−x and Y0.5Zr0.5O2−y phases.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 6 , June 2001 , pp. 1806 - 1813
Copyright
Copyright © Materials Research Society 2001

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