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ferroelectric ceramics

Amir Abdollahi's picture

Conducting crack propagation driven by electric fields in ferroelectric ceramics

Thu, 2013-09-12 06:31 - Amir Abdollahi
research
fracture
finite element analysis
phase field modelling
ferroelectric ceramics

This is a recent article in Acta Materialia on the propagation of conducting cracks in ferroelectric ceramics

Title: Conducting crack propagation driven by electric fields in ferroelectric ceramics

Authors: Amir Abdollahi and Irene Arias, Universitat Politecnica de Catalunya (UPC), Barcelona

Abstract:

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Amir Abdollahi's picture

Slow-Fast Crack Propagation in Ferroelectric Single Crystals

Fri, 2011-08-19 11:20 - Amir Abdollahi
research
fracture
evolution of microstructure
finite element methods
ferroelectric ceramics

Dear Colleague,

 

I have uploaded a video which shows the simulation of Slow-Fast crack propagation in ferroelectric single crystals:

http://www.youtube.com/watch?v=6E7WSVOVAWM

 

For technical details, please refer to our recently published paper in Acta Materialia:

http://www.sciencedirect.com/science/article/pii/S1359645411001777

 

Best regards,

Amir Abdollahi

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Journal Club Forum for April 15th: Fracture of Ferroelectrics

Mon, 2008-04-14 13:50 - Chad Landis
fracture
ferroelectric ceramics

Ferroelectric materials have seen applications as actuators (the fuel injection system in the latest BMWs), sensors (naval sonar systems), and ferroelectric nonvolatile random access memories (FRAMs). For actuators and sensors it is the piezoelectric behavior of these materials that is exploited, while for FRAMs the ability of the material to “switch” polarization states is the essential feature for the application. 

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Jie Wang's picture

Phase field simulations of polarization switching-induced toughening in ferroelectric ceramics

Tue, 2007-01-16 22:31 - Jie Wang
research
Tong-Yi Zhang
Phase field simulations
polarization switching-induced toughening
ferroelectric ceramics

Polarization switching-induced shielding or anti-shielding of an electrically permeable crack in a mono-domain ferroelectric material with the original polarization direction perpendicular to the crack is simulated by a phase field model based on the time-dependent Ginzburg-Landau equation. The domain wall energy and the long-range mechanical and electrical interactions between polarizations are taken into account. The phase field simulations exhibit a wing-shape- switched zone backwards the crack tip.

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