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Phase structure and thermal evolution in coatings and powders obtained by the sol-gel process: Part I. ZrO2−11.3 mol% Y2O3

Published online by Cambridge University Press:  31 January 2011

P. C. Rivas ,
M. C. Caracoche ,
J. A. Martínez ,
A. M. Rodríguez ,
R. Caruso ,
N. Pellegri  and
O. de Sanctis
P. C. Rivas
Affiliation:
Programa TENAES, Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, c.c. 67, 1900 La Plata, Argentina
M. C. Caracoche
Affiliation:
Programa TENAES, Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, c.c. 67, 1900 La Plata, Argentina
J. A. Martínez
Affiliation:
Programa TENAES, Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, c.c. 67, 1900 La Plata, Argentina
A. M. Rodríguez
Affiliation:
Programa TENAES, Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, c.c. 67, 1900 La Plata, Argentina
R. Caruso
Affiliation:
Laboratorio de Materiales Ceráamicos, FCEIyA-UNR, IFIR, Av. Pellegrini 250, 2000 Rosario, Argentina
N. Pellegri
Affiliation:
Laboratorio de Materiales Ceráamicos, FCEIyA-UNR, IFIR, Av. Pellegrini 250, 2000 Rosario, Argentina
O. de Sanctis
Affiliation:
Laboratorio de Materiales Ceráamicos, FCEIyA-UNR, IFIR, Av. Pellegrini 250, 2000 Rosario, Argentina
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Abstract

Yttria-stabilized cubic zirconia powders and coatings produced by the sol-gel method have been investigated by Perturbed Angular Correlation Spectroscopy (PAC). Results indicate that the metastable cubic phase is retained during heating and cooling cycles. The hyperfine interaction that describes this cubic phase, once crystallized, exhibits two components in a constant ratio of 4 : 1. The components represent different vacancy configurations. For the fast movement of oxygen vacancies starting at 750 °C, which is reflected by the damping of the hyperfine pattern, an activation energy of 0.96 eV was determined.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 2 , February 1997 , pp. 493 - 500
Copyright
Copyright © Materials Research Society 1997

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