SMuK 2021 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster II
P 17.11: Poster
Freitag, 3. September 2021, 14:00–16:00, P
Diagnostic of temporal behavior of a plasma electrolytic polishing process — •Sehoon An1, Luka Hansen2, Thorben Kewitz1, Gregor Gött1, Sehyun Kwak3, Maik Fröhlich4, Rüdiger Foest1, Katja Fricke1, Antje Quade1, Klaus-Dieter Weltmann1, and Holger Kersten2 — 1Leibniz Institute for Plasma Science and Technology (INP), Greifswald, Germany — 2Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany — 3Max Plank Institute for Plasma Physics, Greifswald, Germany — 4Leupold Institute of Applied Sciences, University of Applied Sciences Zwickau, Zwickau, Germany
Plasma electrolytic polishing (PEP) has gained much attention owing to various surface modifications including oxidation or removal of material by selective dissolution of chemical compounds. During the PEP process, a volatilization of the electrolyte leads to a gas layer around the working electrode accompanied with spark discharges. The stability of the gaseous layer directly influences the material removal rate. Here, we investigate the temporal behavior of the gaseous layer involving numerous single discharges by synchronized electrical monitoring (current and voltage waveforms) and optical inspection (high-speed video, 1000 fps). We report on observations regarding oscillating discharge current and characteristic frequencies obtained by fast Fourier transformation (FFT) in relation to the process parameters and the temporal evolution of the workpiece temperature.