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@PHDTHESIS{Heinemann:984322,
author = {Heinemann, Hendrik},
othercontributors = {Bobzin, Kirsten and Tillmann, Wolfgang},
title = {{P}lasmaspritzen mit einem kaskadierten {E}inzellichtbogen},
volume = {78},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Düren},
publisher = {Shaker Verlag},
reportid = {RWTH-2024-04009},
isbn = {978-3-8440-9417-6},
series = {Schriftenreihe Oberflächentechnik},
pages = {1 Online-Ressource : Illustrationen},
year = {2024},
note = {Druckausgabe: 2024. - Auch veröffentlicht auf dem
Publikationsserver der RWTH Aachen University; Dissertation,
RWTH Aachen University, 2023},
abstract = {Atmospheric plasma spraying is a versatile coating
technology for the deposition of a wide range of coating
materials. Cascaded plasma spraying with a single arc is a
relatively new industrial process variant of atmospheric
plasma spraying. The generators used in this process combine
the advantages of incorporating the rather simple design of
single-arc generator and of generating high power,
characteristic for cascaded generators. However, the
generators are still quite unknown, especially with regard
to the movement of the arc and the resulting stability of
the plasma jet. In this work, the stability of generators
used in cascaded plasma spraying are investigated by means
of measurements of the electrical parameters in combination
with high-speed recordings. For this purpose, a new
methodology is developed which allows a quantitative
analysis of the recordings and an evaluation of their
influence on the particles. The results show that the
cascaded single arc generators have a comparable process
stability to cascaded multiple arc systems. These
investigations are accompanied by simulations of the plasma
generator and the particle-loaded free jet to predict the
particle velocities and temperatures. The simulations are
able to predict the net power and electrical power. Based on
this, the simulations can model the particle velocities with
good accuracy, even though the particle temperatures are
currently slightly overestimated. In the third part of this
thesis, the anode attachment positions of the arc in the
plasma generator are analysed by simulations and
experimental investigations and manipulated with external
magnetic fields. The feasibility of the manipulation is
demonstrated, and it is shown that it can have an influence
on the deposition efficiency. The stability analysis based
on the high-speed images is a novel approach, which was used
for the first time in this work. This also applies to the
prediction of particle temperatures for a cascaded plasma
generator, which has not been carried out before. The
stability assessment methodology can be used in the future
for the evaluation and further development of plasma
generators. Further, the simulations of the particle
properties of the CSA enable a faster development of
parameters for new coating systems.},
cin = {419010},
ddc = {620},
cid = {$I:(DE-82)419010_20140620$},
pnm = {SFB 1120 A10 - Entwicklung simulativer Ansätze zur
gezielten Auslegung der Eigenschaften plasmagespritzter
Beschichtungen (A10) (260045856) / DFG project 336061514 -
Beeinflussung des Lichtbogenverhaltens im kaskadierten
DC-Ein-Kathoden-Ein-Anoden-Plasma-Generator (DC-EKEAPG) zur
Verbesserung der Prozessstabilität und der
Schichteigenschaften (336061514) / DFG project 236616214 -
SFB 1120: Bauteilpräzision durch Beherrschung von Schmelze
und Erstarrung in Produktionsprozessen)},
pid = {G:(GEPRIS)260045856 / G:(GEPRIS)336061514 /
G:(GEPRIS)236616214},
typ = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
doi = {10.18154/RWTH-2024-04009},
url = {https://publications.rwth-aachen.de/record/984322},
}
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