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@ARTICLE{He:838248,
author = {He, Wenting and Mauer, Georg and Vaßen, Robert},
title = {{E}xcitation {T}emperature and {C}onstituent
{C}oncentration {P}rofiles of the {P}lasma {J}et {U}nder
{P}lasma {S}pray-{PVD} {C}onditions},
journal = {Plasma chemistry and plasma processing},
volume = {37},
number = {5},
issn = {1572-8986},
address = {Dordrecht},
publisher = {Springer Science + Business Media B.V.},
reportid = {FZJ-2017-06903},
pages = {1293 - 1311},
year = {2017},
abstract = {Plasma spray-physical vapor deposition (PS-PVD) is a
promising technology to produce columnar structured thermal
barrier coatings with excellent cyclic lifetime. The
characteristics of plasma jets generated by standard plasma
gases in the PS-PVD process, argon and helium, have been
studied by optical emission spectroscopy. Abel inversion was
introduced to reconstruct the spatial characteristics. In
the central area of the plasma jet, the ionization of argon
was found to be one of the reasons for low emission of
atomic argon. Another reason could be the demixing so that
helium prevails around the central axis of the plasma jet.
The excitation temperature of argon was calculated by the
Boltzmann plot method. Its values decreased from the center
to the edge of the plasma jet. Applying the same method, a
spurious high excitation temperature of helium was obtained,
which could be caused by the strong deviation from local
thermal equilibrium of helium. The addition of hydrogen into
plasma gases leads to a lower excitation temperature,
however a higher substrate temperature due to the high
thermal conductivity induced by the dissociation of
hydrogen. A loading effect is exerted by the feedstock
powder on the plasma jet, which was found to reduce the
average excitation temperature considerably by more than 700
K in the Ar/He jet.},
cin = {IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
Training in Energy and Climate Research (HITEC)
(HITEC-20170406)},
pid = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000407131900001},
doi = {10.1007/s11090-017-9832-8},
url = {https://juser.fz-juelich.de/record/838248},
}