Hauptseite > Online First > Investigation of the Process Stability and Effectiveness Using a Multi-Arc Spraying Torch with Axial Suspension Injection > print

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024 7 _ |a 10.1007/s11666-025-02093-2
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024 7 _ |a 1544-1016
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037 _ _ |a FZJ-2025-04420
082 _ _ |a 670
100 1 _ |a Schmitt, J.
|0 P:(DE-Juel1)188130
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|e Corresponding author
111 2 _ |a 2025 International Thermal Spray Conference
|g ITSC2025
|c Vancouver
|d 2025-05-05 - 2025-05-08
|w Canada
245 _ _ |a Investigation of the Process Stability and Effectiveness Using a Multi-Arc Spraying Torch with Axial Suspension Injection
260 _ _ |a Boston, Mass.
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520 _ _ |a The Axial IIITM torch is a multi-arc plasma generator equipped with three single cathode–anode units. It is widely used for suspension plasma spraying because of its axial feedstock injection. Previous work has shown that the plasma jet is not completely homogeneous, due to power fluctuations and the triple distribution of the plasma enthalpy. This could affect the stability and efficiency of the spraying process. Therefore, state-of-the-art process diagnostics were used to further characterize the process. The plasma characteristics were studied at three different compositions while spraying a 30% wt.% Y2O2 water-based suspension using two different nozzle geometries. Time-resolved measurements of voltages and currents were used to gain insight into the arc dynamics and the plasma-suspension interaction. The resulting in-flight particle temperatures and velocities were analyzed using the Accuraspray 4.0. The specific plasma gas composition, particularly the nitrogen content, affected the temperature and transport coefficients of the plasma and thus the particle characteristics. These factors, in turn, directly affected the deposition efficiency and the microstructure of the resulting coatings, as demonstrated by the experiments. Meanwhile, the overall process efficiency decreased for the nozzle with the reduced expansion ratio. This study provides the basis for deriving measures to improve the stability and efficiency of suspension plasma spraying.
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536 _ _ |a DFG project G:(GEPRIS)501838742 - Gezielte Verbesserung der Stabilität und Effizienz des Suspensionsplasmaspritzens mittels angepasster diagnostischer Methoden (501838742)
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700 1 _ |a Zimmermann, S.
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700 1 _ |a Kirner, C.
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700 1 _ |a Vaßen, R.
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700 1 _ |a Schein, J.
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700 1 _ |a Mauer, G.
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773 _ _ |a 10.1007/s11666-025-02093-2
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910 1 _ |a Forschungszentrum Jülich
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910 1 _ |a Institute of Physics, University of the Bundeswehr Munich, Neubiberg, Germany
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910 1 _ |a Institut für Werkstoffe, Ruhr-Universität Bochum, Bochum, Germany
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910 1 _ |a Institute of Physics, University of the Bundeswehr Munich, Neubiberg, Germany
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910 1 _ |a Department of Mechanical Engineering, Technische Universität Dortmund, Dortmund, Germany
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