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@ARTICLE{Mauer:858377,
author = {Mauer, Georg},
title = {{N}umerical {S}tudy on {P}article–{G}as {I}nteraction
{C}lose to the {S}ubstrates in {T}hermal {S}pray {P}rocesses
with {H}igh-{K}inetic and {L}ow-{P}ressure {C}onditions},
journal = {Journal of thermal spray technology},
volume = {28},
number = {1-2},
issn = {1544-1016},
address = {Boston, Mass.},
publisher = {Springer},
reportid = {FZJ-2018-07263},
pages = {27-39},
year = {2019},
abstract = {In thermal spray processes, the interaction between the gas
jet and the particulate feedstock can affect the coating
build-up mechanisms considerably. In particular under
high-kinetic and low-pressure conditions, small particles
are subjected to rapid deflection and velocity changes close
to the substrate. In this work, numerical studies were
carried out to investigate the interaction between gas and
particles in the substrate boundary layers (BL). Typical
conditions for suspension plasma spraying (SPS), plasma
spray-physical vapor deposition (PS-PVD), and aerosol
deposition (AD) were taken as a basis. Particular importance
was attached to the consideration of rarefaction and
compressibility effects on the drag force. Typical Stokes
numbers for the different thermal spray processes were
calculated and compared. Possible effects on the resulting
coating build-up mechanisms and microstructure formation are
discussed. The results show that just for larger particles
in the SPS process the laminar flow attached to the
particles begins to separate so that the drag coefficients
have to be corrected. Furthermore, slip effects occur in all
the investigated processes and must be considered. The
comparison of calculated Stokes numbers with critical values
shows that there is a disposition to form columnar
microstructures or stacking effects depending on the
particle size for PS-PVD and SPS, but not for AD.},
cin = {IEK-1},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113)},
pid = {G:(DE-HGF)POF3-113},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000456599500004},
doi = {10.1007/s11666-018-0810-3},
url = {https://juser.fz-juelich.de/record/858377},
}