21 July 2004 Crack growth in lead magnesium niobate: lead titanate ceramics by cyclic electric fields
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Abstract
Pre-existing cracks introduced by a Vickers diamond hardness indenter in PMN-0.3PT, which displays piezoelectric properties, increase in length under the action of low frequency cyclic electric fields applied normal to the crack. A minimum applied field of 1.1 x Ec is required to cause crack growth. In applied fields of 1.85-5.70 x Ec cracks grow to a common limiting length which is approximately 0.8 times the separation between the electrodes. New cracks are not generated at the corners of a Vickers diamond indent by applied fields up to 5.70 x Ec.
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Stephen H. Ferguson, Hubert W. King, David F. Waechter, Richard Blacow, S. Eswar Prasad, "Crack growth in lead magnesium niobate: lead titanate ceramics by cyclic electric fields", Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); doi: 10.1117/12.540077; https://doi.org/10.1117/12.540077
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