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Impedance Spectroscopy Investigation on the Low-Temperature Degradation of Tetragonal Zirconia: Influence of Measurement Conditions

Published online by Cambridge University Press:  10 February 2011

A. P. Santos  and
R. Z. Domingues
A. P. Santos
Affiliation:
Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN), C.P. 941, 30123-970, Belo Horizonte, MG - Brazil, adelina@urano.cdtn.br
R. Z. Domingues
Affiliation:
Departamento de Quimica, Universidade Federal de Minas Gerais C.P.702, 31270-901 Belo Horizonte, MG, Brazil
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Abstract

Impedance spectroscopy has been used for the characterization the low-temperature degradation of yttria-stabilized tetragonal zirconia polycrystals in a non-destructive assay. Superficial transformations resulting from annealing in air lead to the appearance of an extra relaxation in the impedance spectra which evolves with degradation extent. It has been demonstrated that in situ electrical characterization cannot be performed because the electrode layers retard the degradation phenomenon. The ideal temperature/time condition to record spectra is also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 591 , 1999 , 87
Copyright
Copyright © Materials Research Society 2000

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References

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