Phase-field modeling for ferroelectrics.pdf

Phase-field modeling for ferroelectrics PDF

Benjamin M. Völker

The primary objective of this work is to apply phase-field modeling in a knowledge based multi-scale simulation approach for the ferroelectric polycrystalline ceramics lead titanate and lead zirconate titanate (PZT) in order to bridge the gap between predictive atomistic and micromechanical modeling methods. Two interfaces in the multi-scale simulation chain are developed and established. Results of atomistic calculations are employed as input parameters for a phase-field model connecting the atomic level to the meso-scale. A novel and completely knowledge based adjustment method is developed for the core of the phase-field model-its thermodynamic free energy function. Furthermore, the elastic properties of the free energy function are improved by introducing higher order terms. In order to link the meso- to the micro-scale in the simulation chain, the phase-field model is implemented in a finite-element formulation. Typical ferroelectric domain configurations as well as defect mechanisms are investigated under electromechanical loading, identifying reversible domain wall motion and bending as governing mechanisms influencing small-signal parameters on the meso-scale.

The U.S. Department of Energy's Office of Scientific and Technical Information

9783838125800 ISBN
Phase-field modeling for ferroelectrics.pdf


PC und Mac

Lesen Sie das eBook direkt nach dem Herunterladen über "Jetzt lesen" im Browser, oder mit der kostenlosen Lesesoftware Adobe Digital Editions.

iOS & Android

Für Tablets und Smartphones: Unsere Gratis tolino Lese-App

Andere eBook Reader

Laden Sie das eBook direkt auf dem Reader im herunter oder übertragen Sie es mit der kostenlosen Software Sony READER FOR PC/Mac oder Adobe Digital Editions.


Öffnen Sie das eBook nach der automatischen Synchronisation auf dem Reader oder übertragen Sie es manuell auf Ihr tolino Gerät mit der kostenlosen Software Adobe Digital Editions.

Aktuelle Bewertungen

Sofya Voigtuh

Phase-Field Modeling of Domain Structure Energetics and Evolution in Ferroelectric Thin Films A computational model developed based on the phase-field approach is used to model domain structures in ferroelectric thin films and to quantify the effects of strain and applied electric field on the microstructural evolution, and on the induced dielectric, electrostrictive, and …

Mattio Müllers

Phase-Field Modeling for Ferroelectrics book. Read reviews from world’s largest community for readers. The primary objective of this work is to apply pha

Noels Schulzen

ABSTRACT NONTECHNICAL SUMMARY This award supports theoretical research and computational modeling, and education with an aim to better understand ferroelectrics, which are multifunctional materials that have many uses, including actuators, sensors, memory storage, and microelectromechanical systems. These materials can not only produce electric signals under … Phase-field modeling for ferroelectrics: in a multi …

Jason Leghmann

Based on characteristic functions of variants, we developed an unconventional phase field modeling for investigating domains formation and evolution in tetragonal ferroelectrics. Pressure-induced switching in ferroelectrics: …

Jessica Kolhmann

Freigegeben Zeitschriftenartikel Coordinate-invariant phase field modeling of ferro-electrics, part II: Application to composites and poly-crystals Phase-field modeling for ferroelectrics - …