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Title: Residual stress relief due to fatigue in tetragonal lead zirconate titanate ceramics

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.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. School of Materials, University of Manchester, Grosvenor St., Manchester M1 7HS (United Kingdom)
  2. Institute for Materials Research, Woodhouse Lane, University of Leeds, LS2 9JT (United Kingdom)
  3. Meggitt Sensing Systems, Hejreskovvej 18A, 3490 Kvistgaard (Denmark)
  4. ESRF, 6 Rue Jules Horowitz, BP-220, 38043 Grenoble Cedex (France)
Publication Date:
OSTI Identifier:
22122803
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 2; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERAMICS; CRACKS; CRYSTAL STRUCTURE; FATIGUE; FERROELECTRIC MATERIALS; FLEXIBILITY; MICROSTRUCTURE; POLARIZATION; POLYCRYSTALS; PZT; REDUCTION; RESIDUAL STRESSES; STRAINS; TETRAGONAL LATTICES; X-RAY DIFFRACTION