| Issue |
J. Phys. IV France
Volume 06, Number C8, Décembre 1996
ICIFUAS 11Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids |
|
|---|---|---|
| Page(s) | C8-703 - C8-706 | |
| DOI | https://doi.org/10.1051/jp4:19968153 | |
ICIFUAS 11
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-703-C8-706
DOI: 10.1051/jp4:19968153
1 Institute of Physics and Chemistry of Metals, Silesial University, 40-007 Katowice, Poland
2 Max-Planck Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestrasse 92, 70174 Stuttgart, Germany
© EDP Sciences 1996
Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-703-C8-706
DOI: 10.1051/jp4:19968153
Analysis of Mechanical Loss Spectra in Zirconia Ceramics by Appying the Coupling Model
G. Haneczok1 and M. Weller21 Institute of Physics and Chemistry of Metals, Silesial University, 40-007 Katowice, Poland
2 Max-Planck Institut für Metallforschung, Institut für Werkstoffwissenschaft, Seestrasse 92, 70174 Stuttgart, Germany
Abstract
Mechanical loss spectra (two peaks) observed in ZrO2 doped with Y2O3 (2-10 mol%), are attributed to oxygen vacancy (V)-yttrium (Y) associates (V-Y pairs and V-2Y agglomerates). Both peaks were analysed numerically by applying the coupling model. It has been shown that : i) the activation enthalpy H for both peaks increases with Y2O3 content, ii) the values of coupling parameter n are about 0.6 - 0.7, iii) the activation enthalpy H0 corresponding to the noninteracting system (dilute case) is about 0.4 eV which is considerably smaller than the activation enthalpy for reorientation of isolated dipoles (0.8 - 0.9 eV)
© EDP Sciences 1996