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Effects of Electric Field on the Fracture Toughness (KIC) of PZT Ceramics

[+] Author Affiliations
Sam Goljahi, David Pisani, John Gallagher, Christopher S. Lynch

University of California Los Angeles, Los Angeles, CA

Paper No. SMASIS2011-4990, pp. 341-345; 5 pages
doi:10.1115/SMASIS2011-4990
From:
  • ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1
  • Scottsdale, Arizona, USA, September 18–21, 2011
  • ISBN: 978-0-7918-5471-6
  • Copyright © 2011 by ASME

abstract

Ceramic PZT with a controlled crack was subjected to combined four point bending and longitudinal electric field loading to determine the fracture toughness (KIC ) as a function of electric field. Application of a positive DC electric field (in the polarization direction) during mechanical loading was observed to reduce the critical stress intensity factor and application of a negative electric field increased the critical stress intensity factor.

Copyright © 2011 by ASME

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