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Publisher DOI: 10.1016/j.jeurceramsoc.2010.11.006
Title: Influence of small cyclic and DC electrical loads on the fracture toughness of ferroelectric ceramics
Language: English
Authors: Engert, Andrea R. 
Neumeister, Peter 
Mecklenburg, Matthias 
Jelitto, Hans 
Balke, Herbert 
Schneider, Gerold A. 
Editor: Technische Universität Dresden, Institut für Festkörpermechanik 
Keywords: Ermüdung;ferroelektrische Eigenschaften;Bruchmechanik;PZT;AC;fatigue;ferroelectric properties;fracture;PZT;AC
Issue Date: 2011
Source: Journal of the European Ceramic Society ; 31.2011,4, pp. 531-540
Journal or Series Name: Journal of the European Ceramic Society 
Abstract (english): 
The present work investigates the influence of small AC, unipolar cyclic and DC electric loads on the fracture toughness of a ferroelectric ceramic. Single-edge-notched beams (SENB) of a poled and unpoled lead zirconate titanate (PZT) ceramic were fractured in a four-point-bending device under conditions of controlled crack growth. During crack advance the different electrical loads were applied perpendicular to the crack faces. The applied nominal electric field amplitudes were less than one third of the coercive field and maximum frequencies of 20 kHz were applied. The measured R-curves show that even for these low amplitudes, electrical AC loading causes a drop in the critical mechanical load of up to 25%. The drop increases with increasing amplitude and frequency. Possible mechanisms to explain the results are discussed.
DOI: 10.15480/882.988
ISSN: 0955-2219
Institute: Keramische Hochleistungswerkstoffe M-9 
Document Type: Article
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