11 July 2001 Crack growth of PZN crystals under cyclic electric field
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Abstract
PZN single crystals are currently under development as actuator materials. They offer high strain and high coupling constants, but the moduli are considerably lower than PZT. Obtaining high energy densities in actuator applications requires that they be driven at high field levels. To accomplish this reliably will involve careful specimen preparation, proper compressive pre-load, and designs that avoid electric field driven fatigue crack growth. This work presents observations of fatigue crack growth under bipolar electric cycling. The crack growth in PZN single crystal is different from that in polycrystalline ceramics.
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Shan Wan, Christopher S. Lynch, "Crack growth of PZN crystals under cyclic electric field", Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); doi: 10.1117/12.432787; https://doi.org/10.1117/12.432787
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