College Park, Maryland      June 6 - 10 , 2004

MP33: Strain and Texture Analysis of the Ferroelastic Behavior of Pb(Zr,Ti)O3

R. C. Rogan, E. Ustundag, S. M. Motahari (Department of Materials Science, California Institute of Technology, Pasadena, California 91125), M. R. Daymond (ISIS, Rutherford Appleton Laboratory)

In-situ uniaxial compression experiments were performed on various Pb(Zr,Ti)O3 or PZT ceramics using neutron diffraction. PZTs near the edge of the morphotropic phase boundary as well as single-phase (tetragonal and rhombohedral) specimens were investigated. Analysis of the diffraction patterns allowed for observation of the onset and culmination of domain switching through modeling of the sample texture using the March-Dollase approach. This model also provided quantitative information about domain switching under applied stress. Elastic lattice strain data suggested a high degree of anisotropy and a complicated internal stress state. The effectiveness of electrical poling and mechanical depoling was also evaluated. The contrast between single and multiphase systems will be highlighted. Results will be compared to the predictions of a new self-consistent mechanics model of ferroelectric constitutive behavior.

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