Anisotropic Fracture Behavior in Ferroelectric Relaxor PZN-4.5%PT Single Crystals
Publication Type:
Journal
Authors:
Co-Authors:
Lynch, C.S., Kounga Nijwa, A.B., and Lupascu, D.C.
Year Published:
2005
Abstract:
The anisotropic fracture behavior in unpoled and poled (1−x)Pb(Zn2/3Nb1/3)−xPbTiO3 (x=0.045) (PZN–4.5%PT) single‐crystal relaxor ferroelectrics cut along the crystal planes, [010] and [001], was characterized. The crack tip toughness (Ktip) determined from Vickers indentations was compared with the R‐curve behavior measured using the single‐edge V‐notch beam (SEVNB) method. Several of the SEVNB fracture experiments resulted in cracks forming and propagating under mixed mode loading (KI and KII) along the [110] crystal plane. Other specimens formed cracks at 0° along the [010] plane. To assess the anisotropic fracture behavior, the local and global critical energy release rates were determined using Stroh's formalism.
Journal:
Journal of the American Ceramic Society
Volume:
88
Issue:
7
Pagination:
1834-1844
ISSN:
Short Title:
Date Published:
5/25/2005