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.
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Acknowledgments
The authors thank the staff of the LEPMI laboratory (INPG-CNRS, Grenoble-France), where the impedance measurements were conducted, and in particular, Dr. M. Kleitz for his most valuable discussions. Special thanks are extended to Dr. C. M. Steil, who provided the initial idea for his work. A. P. Santos acknowledges a scholarship from CAPES and the authors thank the support of Fapemig.
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Santos, A.P., Domingues, R.Z. Impedance Spectroscopy Investigation on the Low-Temperature Degradation of Tetragonal Zirconia: Influence of Measurement Conditions. MRS Online Proceedings Library 591, 97–102 (1999). https://doi.org/10.1557/PROC-591-87
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DOI: https://doi.org/10.1557/PROC-591-87