Erosion, permeation and outgassing performances of tin coating under/after hydrogen plasma iffadiation

• Published in: Вопросы атомной науки и техники
• Date: 2000
• Main Authors: Glazunov, G.P., Volkov, E.D., Veremeyenko, V.P., Kosik, N.A., Kutsyn, Al.A., Langner, J., Langner, E., Mironov, Yu.K., Nazarov, N.I., Piekoszewski, J., Sadowski, M., Stanislawski, J., Tereshin, V.I.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2000
• Subjects: Low temperature plasma and plasma technologies
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/78559
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Erosion, permeation and outgassing performances of tin coating under/after hydrogen plasma iffadiation / G.P. Glazunov, E.D. Volkov, V.P. Veremeyenko, N.A. Kosik, Al.A. Kutsyn, J. Langner, E. Langner, Yu.K. Mironov, N.I. Nazarov, J. Piekoszewski, M. Sadowski, J. Stanislawski, V.I. Tereshin // Вопросы атомной науки и техники. — 2000. — № 6. — С. 155-159. — Бібліогр.: 18 назв. — англ.

An erosion behavior of TiN-coated stainless-steel (SS) surfaces was investigated during biased-limiter experiments within the Uragan-3M torsatron and during simulation experiments, which were performed with plasma-accelerator and glow-discharge (GD) plasmas. For a TiN-coated SS head-plate of a limiter the arc ignition probability was found to be lower than 10-4 per plasma pulse. Possible physical mechanisms of this effect had been discussed. Within special vacuum stands, using thermal-desorption and mass-spectrometry methods, there were performed measurements of an outgassing rate and hydrogen permeability of TiNcoatings. The negligible outgassing from TiN-coated SS samples, during their heating up to 473 K, was observed after a cleaning procedure with a molecular hydrogen inflow under pressure of about 10-4 Torr, on contrary to the considerable increase of (q) rate for the irradiated samples. Measured values of the TiN-film hydrogen permeability were several times lower, and activation energy of the hydrogen permeation was considerably lower than that for the SS films (15 kJ/mole instead of 19.9 kJ/mole). The use of TiN-coated SS and diffusion membranes, for the reduction of the erosion, recycling, and hydrogen isotope inventory control, as well as for improvement of vacuum conditions, has been considered.