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001047620 0247_ $$2doi$$a10.1007/s11666-025-02093-2
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001047620 1001_ $$0P:(DE-Juel1)188130$$aSchmitt, J.$$b0$$eCorresponding author
001047620 1112_ $$a2025 International Thermal Spray Conference$$cVancouver$$d2025-05-05 - 2025-05-08$$gITSC2025$$wCanada
001047620 245__ $$aInvestigation of the Process Stability and Effectiveness Using a Multi-Arc Spraying Torch with Axial Suspension Injection
001047620 260__ $$aBoston, Mass.$$bSpringer$$c2025
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001047620 520__ $$aThe 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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001047620 536__ $$0G:(GEPRIS)501838742$$aDFG project G:(GEPRIS)501838742 - Gezielte Verbesserung der Stabilität und Effizienz des Suspensionsplasmaspritzens mittels angepasster diagnostischer Methoden (501838742)$$c501838742$$x1
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001047620 7001_ $$0P:(DE-HGF)0$$aZimmermann, S.$$b1
001047620 7001_ $$0P:(DE-HGF)0$$aKirner, C.$$b2
001047620 7001_ $$0P:(DE-Juel1)129670$$aVaßen, R.$$b3$$ufzj
001047620 7001_ $$0P:(DE-HGF)0$$aSchein, J.$$b4
001047620 7001_ $$0P:(DE-Juel1)129633$$aMauer, G.$$b5$$ufzj
001047620 773__ $$0PERI:(DE-600)2047715-6$$a10.1007/s11666-025-02093-2$$pTBD$$tJournal of thermal spray technology$$vTBD$$x1059-9630$$y2025
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001047620 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Institute of Physics, University of the Bundeswehr Munich, Neubiberg, Germany$$b1
001047620 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129670$$aForschungszentrum Jülich$$b3$$kFZJ
001047620 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)129670$$aInstitut für Werkstoffe, Ruhr-Universität Bochum, Bochum, Germany$$b3
001047620 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$a Institute of Physics, University of the Bundeswehr Munich, Neubiberg, Germany$$b4
001047620 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129633$$aForschungszentrum Jülich$$b5$$kFZJ
001047620 9101_ $$0I:(DE-HGF)0$$6P:(DE-Juel1)129633$$a Department of Mechanical Engineering, Technische Universität Dortmund, Dortmund, Germany$$b5
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