Ferroelastic domain switching fatigue in lead zirconate titanate ceramics
The influence of the frequency and amplitude of cyclic mechanical loading on soft, tetragonal lead zirconate titanate (PZT) ceramics was investigated via neutron diffraction. Intensity change in the {2 0 0} reflections provided quantitative measurements of domain switching behavior, domain texture and the strain resulting from domain switching. The results are explained using a viscoelasticity model. It was found that the magnitude of applied stress affects the level of strain accumulated, while its frequency affects the time taken for the strain to reach saturation. Furthermore, markedly different behaviors are exhibited by poled and unpoled samples. For samples loaded under identical conditions, the frequency effect is more pronounced in unpoled samples and the accumulated ferroelastic strain is greater in poled samples.
Soodkhet Pojprapai ImlaoEmail:soodkhet@student.unsw.edu.au?Jacob L. Jonesb?Andrew J. Studerc?Jennifer Russella?Nagarajan Valanoora?Mark Hoffmana
[a]School of Materials Science; Engineering, University of New South Wales, Sydney, NSW 2052, Australia;[b]Department of Materials Science; Engineering, University of Florida, Gainesville, FL, USA;[c]Bragg Institute, Australian Nuclear Science; Technology Organisation, Sydney, NSW, Australia
