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@ARTICLE{Dubinko:836434,
author = {Dubinko, A. and Terentyev, D. and Bakaeva, A. and
Hernández-Mayoral, M. and De Temmerman, G. and Buzi, L. and
Noterdaeme, J.-M. and Unterberg, B.},
title = {{S}ub-surface microstructure of single and polycrystalline
tungsten after high flux plasma exposure studied by {TEM}},
journal = {Applied surface science},
volume = {393},
issn = {0169-4332},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {FZJ-2017-05555},
pages = {330 - 339},
year = {2017},
abstract = {We have performed high flux plasma exposure of tungsten and
subsequent microstructural characterization using
transmission electron microscopy (TEM) techniques. The aim
was to reveal the nanometric features in the sub-surface
region as well as to compare the microstructural evolution
in tungsten single crystal and ITER-relevant specification.
In both types of samples, TEM examination revealed the
formation of a dense dislocation network and dislocation
tangles. The estimated dislocation density in the
sub-surface region was of the order of 1014 m−2 and it
gradually decreased with a depth position of the examined
sample. Besides individual dislocation lines, networks and
tangles, the interstitial dislocation loops have been
observed in all examined samples only after the exposure.
Contrary to that, examination of the pristine single crystal
W and backside of the plasma-exposed samples did not reveal
the presence of dislocation loops and tangles. This clearly
proves that high flux plasma exposure induces severe plastic
deformation in the sub-surface region irrespective of the
presence of initial dislocations and sub-grains, and the
formation of dislocation tangles, networks and interstitial
loops is a co-product of thermal stress and intensive plasma
particles uptake.},
cin = {IEK-4},
ddc = {670},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000389090700038},
doi = {10.1016/j.apsusc.2016.09.071},
url = {https://juser.fz-juelich.de/record/836434},
}