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Proceedings Paper

Crack growth in lead magnesium niobate: lead titanate ceramics by cyclic electric fields
Author(s): Stephen H. Ferguson; Hubert W. King; David F. Waechter; Richard Blacow; S. Eswar Prasad
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Paper 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.

Paper Details

Date Published: 21 July 2004
PDF: 6 pages
Proc. SPIE 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics, (21 July 2004); doi: 10.1117/12.540077
Show Author Affiliations
Stephen H. Ferguson, Univ. of Victoria (Canada)
Hubert W. King, Univ. of Victoria (Canada)
David F. Waechter, Sensor Technology Ltd. (Canada)
Richard Blacow, Sensor Technology Ltd. (Canada)
S. Eswar Prasad, Sensor Technology Ltd. (Canada)


Published in SPIE Proceedings Vol. 5387:
Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics
Dimitris C. Lagoudas, Editor(s)

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