Erlangen 2018 – scientific programme
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P: Fachverband Plasmaphysik
P 23: Plasma Wall Interaction II
P 23.2: Talk
Thursday, March 8, 2018, 11:00–11:15, A 0.112
Plasma chemical studies of nitrocarburizing with an active screen made of carbon — •Alexander D. F. Puth1, Stephan Hamann1, Lukas Kusyn2, Igor Burlacov3, Anke Dalke3, Heinz-Joachim Spies3, Horst Biermann3, Jürgen Röpcke1, and Jean-Pierre H. van Helden1 — 1INP Greifswald, 17489 Greifswald, Germany — 2Masaryk University, 60200 Brno, Czech Republic — 3Institute of Materials Engineering, TU Bergakademie Freiberg, 09599 Freiberg, Germany
Active screen plasma nitrocarburizing (ASPNC) is an advanced technology for the surface treatment of steel components. A new approach of this method is the usage of an active screen made of solid carbon as a substitute for carbon-containing gas supplements. The investigations have been carried out in the laboratory scale reactor PLANIMOR.
We will present the results of spectroscopic studies of N2-H2 containing pulsed DC discharges. The concentrations of CH3, CH4, C2H2, C2H4, C2H6, C2N2, NH3, HCN, and CO have been determined with infrared laser absorption spectroscopy (IRLAS), using tunable diode lasers (TDL) and external cavity quantum cascade lasers (EC-QCL). Futhermore, the gas temperature of the stable molecular species and of the CH3 radical has been determined using Bolzmann plot and line profile analysis, respectivly. The concentrations being measured as a function of the plasma power at the active screen, the gas pressure and the feed gas composition, ranged between 1012 and 1016 molecules cm−3.