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TECHNICAL PAPERS

Measuring Strain Distribution During Mesoscopic Domain Reorientation in a Ferroelectric Material

[+] Author and Article Information
S. B. Park

IBM, Microelectronics Division, 1701 N. Street, Endicott, NY 13760

S. S. Park, G. P. Carman, H. T. Hahn

Mechanical and Aerospace Engineering Department, UCLA, Los Angeles, CA 90095

J. Eng. Mater. Technol 120(1), 1-6 (Jan 01, 1998) (6 pages) doi:10.1115/1.2806833 History: Received October 12, 1996; Revised June 16, 1997; Online November 27, 2007

Abstract

In this paper, we present the results of an experimental study focused on understanding the strain concentrations arising due to nonlinear phenomena associated with polarization switching. A moire interferometry technique is used to measure the normal and shear strains of a PZT-5H piezoceramic undergoing 180 and 90 deg switching. These results include the strain concentrations measured between polarized regions oriented 180 and 90 deg apart. The results show that very large strain mismatches (e.g., as large as 4500 microstrains) occur along the boundary of dissimilar oriented domains, suggesting a source of microcrack initiation and fatigue degradation.

Copyright © 1998 by The American Society of Mechanical Engineers
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