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Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures

Sluka, Tomas and Webber, Kyle G. and Colla, Enrico and Damjanovic, Dragan (2012):
Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures.
60, In: Acta Materialia, (13-14), pp. 5172-5181, ISSN 13596454, [Online-Edition: http://dx.doi.org/10.1016/j.actamat.2012.06.023],
[Article]

Abstract

Limited reliability of ferroelectric-based actuators restricts their use in high-performance applications, where stress-induced cracking of ferroelectric ceramics often leads to fatal failure. The main limiting factors are the relatively small fracture toughness and the brittle nature of ferroelectrics. However, ferroelectrics naturally exhibit fracture toughening (so called ferroelastic toughening) due to stress induced reorientation of non-180° domains that inhibits crack propagation. Here we present a phase-field study of ferroelastic toughening based on Landau–Ginzburg–Devonshire theory. The primary qualitative factors that control the magnitude of ferroelastic toughening are identified and discussed.

Item Type: Article
Erschienen: 2012
Creators: Sluka, Tomas and Webber, Kyle G. and Colla, Enrico and Damjanovic, Dragan
Title: Phase field simulations of ferroelastic toughening: The influence of phase boundaries and domain structures
Language: English
Abstract:

Limited reliability of ferroelectric-based actuators restricts their use in high-performance applications, where stress-induced cracking of ferroelectric ceramics often leads to fatal failure. The main limiting factors are the relatively small fracture toughness and the brittle nature of ferroelectrics. However, ferroelectrics naturally exhibit fracture toughening (so called ferroelastic toughening) due to stress induced reorientation of non-180° domains that inhibits crack propagation. Here we present a phase-field study of ferroelastic toughening based on Landau–Ginzburg–Devonshire theory. The primary qualitative factors that control the magnitude of ferroelastic toughening are identified and discussed.

Journal or Publication Title: Acta Materialia
Volume: 60
Number: 13-14
Uncontrolled Keywords: Ferroelectricity; Toughness; Fracture; Phase field models; Simulation
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 30 Jul 2012 11:45
Official URL: http://dx.doi.org/10.1016/j.actamat.2012.06.023
Identification Number: doi:10.1016/j.actamat.2012.06.023
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