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Anisotropic Fracture Behavior in Ferroelectric Relaxor PZN-4.5%PT Single Crystals

Oates, William S. and Lynch, Christopher S. and Kounga Njiwa, Alain B. and Lupascu, Doru C. (2005):
Anisotropic Fracture Behavior in Ferroelectric Relaxor PZN-4.5%PT Single Crystals.
In: Journal of the American Ceramic Society, (7), 88. pp. 1838-1844, ISSN 0002-7820,
[Online-Edition: http://dx.doi.org/10.1111/j.1551-2916.2005.00332.x],
[Article]

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.

Item Type: Article
Erschienen: 2005
Creators: Oates, William S. and Lynch, Christopher S. and Kounga Njiwa, Alain B. and Lupascu, Doru C.
Title: Anisotropic Fracture Behavior in Ferroelectric Relaxor PZN-4.5%PT Single Crystals
Language: English
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 or Publication Title: Journal of the American Ceramic Society
Journal volume: 88
Number: 7
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00332.x
Identification Number: doi:10.1111/j.1551-2916.2005.00332.x
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