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Using EBSD and TEM‐Kikuchi patterns to study local crystallography at the domain boundaries of lead zirconate titanate
Author(s) -
FAROOQ M. U.,
VILLAURRUTIA R.,
MACLAREN I.,
KUNGL H.,
HOFFMANN M. J.,
FUNDENBERGER J.J.,
BOUZY E.
Publication year - 2008
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/j.1365-2818.2008.02004.x
Subject(s) - misorientation , electron backscatter diffraction , materials science , orientation (vector space) , lead zirconate titanate , diffraction , tetragonal crystal system , noise (video) , domain (mathematical analysis) , crystallography , ferroelectricity , mineralogy , optics , geometry , geology , physics , composite material , microstructure , mathematics , chemistry , mathematical analysis , image (mathematics) , crystal structure , computer science , dielectric , grain boundary , optoelectronics , artificial intelligence
Summary Reliable EBSD mapping of 90° domains in a tetragonal ferroelectric perovskite has been achieved for the first time, together with reliable automated orientation determination from TEM‐Kikuchi patterns. This has been used to determine misorientation angles at 90° domain boundaries and thus local c / a ratios. The sources of orientation noise/error and their effects on the misorientation angle data have been thoroughly analyzed and it is found that this gives a cosine distribution of misorientation angles about the mean with a characteristic width related to the width of the orientation noise distribution. In most cases, a good agreement is found between local c / a ratios and global measurements by X‐ray diffraction, but some clear discrepancies have also been found suggesting that real local variations are present, perhaps as a consequence of compositional inhomogeneities.