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@ARTICLE{Heidelmann:173076,
author = {Heidelmann, Markus and Heggen, Marc and Feuerbacher,
Michael},
title = {{O}n the stability of metadislocations with 16 associated
phason planes},
journal = {Intermetallics},
volume = {53},
issn = {0966-9795},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2014-06489},
pages = {187 - 191},
year = {2014},
abstract = {High-resolution scanning transmission electron microscopy
was used to investigate the core structure of a
metadislocation in a plastically deformed sample of the
complex metallic alloy ε 6-Al–Pd–Mn. The atomic-level
characterization of a metadislocation with 16 associated
phason planes showed dissociation into metadislocations with
6 and 10 phason planes. A structural model of the
dissociated core region was developed. The Burgers vector of
the dislocation View the MathML sourceb→16 = −0.07 nm
[001] splits up into View the MathML sourceb→6 = −0.183
nm [001] and View the MathML sourceb→10 = 0.113 nm [001]
increasing the strain at the metadislocation cores. Although
unfavourable with respect to an increasing elastic strain
energy the dissociation is realized due to a decrease in
fault-plane energy. The latter arises from a size reduction
of the ξ-phase area that is required to accommodate the
metadislocation in the structure. A careful inspection of
several exemplary metadislocations with 16 phason planes
using electron microscopy indicates their dissociated
structure which casts doubt on the stability of elementary
metadislocations with 16 phason planes. The study includes a
detailed analysis of the structure of a metadislocation core
with 6 associated phason planes.},
cin = {PGI-5},
ddc = {660},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {424 - Exploratory materials and phenomena (POF2-424)},
pid = {G:(DE-HGF)POF2-424},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000338818000024},
doi = {10.1016/j.intermet.2014.05.005},
url = {https://juser.fz-juelich.de/record/173076},
}