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Stress induced ferroelastic switching may represent an efficient toughening mechanism in piezoelectric-ferroelectric ceramics. During the crack propagation, the high tensional stresses at the crack tip can be partially released by the reorientation of 90 degree domains from along to perpendicular to the propagation direction. Compared to the phase transformation approach (inclusion of zirconia particles...
In this paper we report an experimental study of electron emission from PLZT ceramic disc on application of high voltage excitation pulses and observed damage. Effect of 90deg domain switching on the internal stress developed in the ferroelectric sample has been studied through X-ray diffraction, d31 values were calculated from shift in XRD peaks.
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