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6575 |
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Friday, June 12, 2020, Hall D 2:40 PM Plasma Spraying |
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Diagnostic results and investigations of a cascaded DC single-cathode-single-anode plasma generator |
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Stephan Zimmermann* / University of the Federal Armed Forces Munich, Germany Jochen Schein/ University of Federal Armed Forces Munich IPM (LPT), Germany Kirsten Bobzin/ Surface Engineering Institute (IOT), RWTH Aachen University, Germany Wolfgang Wietheger/ Surface Engineering Institute (IOT), RWTH Aachen University, Martin Andreas Knoch/ Surface Engineering Institute (IOT), RWTH Aachen University, Germany Hendrik Heinemann/ Surface Engineering Institute (IOT), RWTH Aachen University, Germany |
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The use of plasma generators for thermal surface coating has grown enormously in the field of thermal insulation and wear-resistant coatings, especially with regard to deposition of refractory oxide ceramic layers using powders such as alumina, alumina / titania, zirconia and chromium oxide. Nonetheless, innovative plasma sources are still being developed to provide more-efficient, tailor-made solutions due to their specific characteristics. A brief overview on the DFG project DC Single-Cathode Single-Anode Plasma Generator is given. In this paper, first diagnostic results characterizing the physical behaviour and special plasma symmetry are shown. Thereby computer tomography (CT), high-speed camera investigations coupled with time-adjusted current-voltage measurements and resulting coatings are presented and discussed. The complete paper concludes with an outlook for future diagnostic measurements and possible future applications for this DC-plasma torch. |