Residual stress relief due to fatigue in tetragonal lead zirconate titanate ceramics
- School of Materials, University of Manchester, Grosvenor St., Manchester M1 7HS (United Kingdom)
- Institute for Materials Research, Woodhouse Lane, University of Leeds, LS2 9JT (United Kingdom)
- Meggitt Sensing Systems, Hejreskovvej 18A, 3490 Kvistgaard (Denmark)
- ESRF, 6 Rue Jules Horowitz, BP-220, 38043 Grenoble Cedex (France)
High energy synchrotron XRD was employed to determine the lattice strain {epsilon}{l_brace}111{r_brace}and diffraction peak intensity ratio R{l_brace}200{r_brace}in tetragonal PZT ceramics, both in the virgin poled state and after a bipolar fatigue experiment. It was shown that the occurrence of microstructural damage during fatigue was accompanied by a reduction in the gradient of the {epsilon}{l_brace}111{r_brace}-cos{sup 2} {psi} plot, indicating a reduction in the level of residual stress due to poling. In contrast, the fraction of oriented 90 Degree-Sign ferroelectric domains, quantified in terms of R{l_brace}200{r_brace}, was not affected significantly by fatigue. The change in residual stress due to fatigue is interpreted in terms of a change in the average elastic stiffness of the polycrystalline matrix due to the presence of inter-granular microcracks.
- OSTI ID:
- 22122803
- Journal Information:
- Journal of Applied Physics, Vol. 114, Issue 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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