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Proceedings Paper

Local fracture properties in ferroelectric relaxor PZN-4.5%PT single crystals
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Paper Abstract

Local fracture properties in poled [Pb(Zn1/3Nb2/3)O3](1-x)-[PbTiO3]x (x=0.045, PZN-4.5%PT) ferroelectric relaxor single crystals were assessed. The crystals were cut along the [100], [010], and [001] planes. Scanning electron micrographs of Vickers indentations for two different crack orientations were used to determine the crack tip toughness (Ktip) and the local critical energy release rate (Gtip). Cracks oriented along the [010] and [110] crystal planes were found to have practically identical local fracture properties. These properties were determined using Stroh's formalism to account for the large anisotropic material coefficients.

Paper Details

Date Published: 16 May 2005
PDF: 6 pages
Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); doi: 10.1117/12.598813
Show Author Affiliations
William S. Oates, North Carolina State Univ. (United States)
Kyle G. Webber, The Georgia Institute of Technology (United States)
Christopher S. Lynch, The Georgia Institute of Technology (United States)
Alain B. Kounga Njiwa, Darmstadt Univ. of Technology (Germany)
Doru C. Lupascu, Darmstadt Univ. of Technology (Germany)


Published in SPIE Proceedings Vol. 5761:
Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics
William D. Armstrong, Editor(s)

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