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Proceedings Paper

Role of crack formation in the electric fatigue behavior of ferroelectric PZT ceramics
Author(s): Doru Constantin Lupascu; Juergen Nuffer; Jay S. Wallace; Juergen Roedel
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Paper Abstract

The electric fatigue behavior of commercial lead zirconate titanate (PZT) was investigated by optical microscopy and instrumented Hertzian microindentation. Macroscopic delamination cracks were found near the electrodes after large numbers of electrical cycles. Additionally, macroscopics edge cracks were found to orientate from the boundary between electroded and unelectroded material. Instrumented Hertzian microindentation measurements on specimen cross sections show larger indentation depths just beneath the electrodes than in the center of the sample. This behavior may result form a higher microcrack density near the electrodes. The role of micro- and macrocracks in the electrical fatigue behavior of ferroelectric ceramics is discussed and compared to macroscopic material parameters and acoustic emissions.

Paper Details

Date Published: 14 June 2000
PDF: 8 pages
Proc. SPIE 3992, Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics, (14 June 2000); doi: 10.1117/12.388205
Show Author Affiliations
Doru Constantin Lupascu, Darmstadt Univ. of Technology (Germany)
Juergen Nuffer, Darmstadt Univ. of Technology (Germany)
Jay S. Wallace, National Institute of Standards and Technology (United States)
Juergen Roedel, Darmstadt Univ. of Technology (Germany)


Published in SPIE Proceedings Vol. 3992:
Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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