Study of Crack Growth Behavior in Commercially As-Received Lead-Zirconate-Titanate
Sukanda Jiansirisomboon* Author for corresponding; e-mail address: sukanda_jian@hotmail.com
Volume: Vol.29 No.1 (APRIL 2002)
Opinion
DOI:
Received: 27 Febuary 2002, Revised: -, Accepted: 23 April 2002, Published: -
Citation: Jiansirisomboon S., Study of Crack Growth Behavior in Commercially As-Received Lead-Zirconate-Titanate, Chiang Mai Journal of Science, 2002; 29(1): 21-29.
Abstract
The growth behavior of cracks in both poled and unpoled Lead-Zirconate-Titanate (PZT) piezoelectric ceramics was studied by using indentation technique. The values of Vickers hardness (Hv) and fracture hardness (KIC) of this material were measured. In the poled samples, the radial crack length was found to be dependent on the orientation of ferroelectric dipole moments with respect to the poling direction, which affected the KIC value. Thus KIC shows significant anisotropy in poled samples. The crack profiles produced by the indentaions both on the indented surface and beneath the indentation were studied in both poled and unpoled samples in order to observe the crack behavior. The physically deformed zone below the indentation presented anisotropy in the poled sample, this could possible explain the anisotropy observed in KIC value.
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