Role of Crack Formation in the Electric Fatigue Behavior of Ferroelectric PZT Ceramics

Published

June 1, 2000

Author(s)

D C. Lupascu, J Nuffer, Jay S. Wallace, J Rodel

Abstract

The electric fatigue behavior of a 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, macroscopic edge cracks were found to originate from the boundary between electroded and unelectroded materal. 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 be the result of 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 emission measurements.

Proceedings Title

Active Materials: Behavior and Mechanics, Conference || Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics | SPIE

Volume

3992

Conference Dates

March 1, 2000

Conference Location

Undefined

Conference Title

Proceedings of SPIE--the International Society for Optical Engineering

Pub Type

Conferences

Keywords

fatigue, ferroelectric, indentation, instrumented, microcrack, PZT

Citation

Lupascu, D. , Nuffer, J. , Wallace, J. and Rodel, J. (2000), Role of Crack Formation in the Electric Fatigue Behavior of Ferroelectric PZT Ceramics, Active Materials: Behavior and Mechanics, Conference || Smart Structures and Materials 2000: Active Materials: Behavior and Mechanics | SPIE, Undefined (Accessed April 19, 2024)