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Strain Evolution of Highly Asymmetric Polycrystalline Ferroelectric Ceramics via a Self‐Consistent Model and In Situ X ‐Ray Diffraction
Author(s) -
Tutuncu Goknur,
Motahari Maziar,
Bernier Joel,
Varlioglu Mesut,
Jones Jacob L.,
Ustundag Ersan
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12011
Subject(s) - diffraction , crystallite , materials science , ferroelectricity , x ray crystallography , synchrotron , ferroelectric ceramics , strain (injury) , texture (cosmology) , ceramic , in situ , crystallography , bending , condensed matter physics , optics , composite material , physics , chemistry , optoelectronics , image (mathematics) , medicine , artificial intelligence , computer science , dielectric , metallurgy , meteorology
Strain and texture evolution (domain switching) of polycrystalline, ferroelectric BaTiO 3 was investigated in four‐point bending geometry. Lattice strains were measured by in situ synchrotron X ‐ray diffraction to address problems related to modeling the constitutive behavior of highly asymmetric ferroelectrics. The hkl ‐dependent strain measured by X ‐ray diffraction was found to be smaller relative to both bulk strain measured by conventional, contact‐based techniques and elastically computed strain, and reasons for this inconsistency are discussed. A self‐consistent model with capabilities of quantifying domain switching and estimating hkl ‐dependent strain is applied to allow a direct comparison with diffraction data.