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Plasma exposure of tungsten in the linear plasma device PSI-2 produced via powder injection molding

Bähner, J. P.; Antusch, S.; Coenen, J.W.; Kreter, A.; Möller, S.; Rasinski, M.; Rieth, M.; Wirtz, M.; Unterberg, B.

Abstract:
Tungsten is envisaged as plasma facing material in fusion reactors because of its small tritium retention and low erosion rate as well as its high melting point and high thermal conductivity. However, it is very hard and brittle, which makes it difficult and expensive to fabricate and prone to crack formation under transient heat loads. The first disadvantage can be ameliorated using Powder Injection Molding (PIM) as fabrication route . With its near-net-shape precision the method offers particularly the advantage of cost saving. Furthermore PIM is an ideal tool for scientific investigations and efficient production of new oxide and carbide doped materials. In this contribution, we report on the initial exposure of pure tungsten produced via PIM (sintered at 2400 °C, density 98,6 - 99%, with equiaxed grain orientation) in the linear plasma device PSI-2 using deuterium and neon plasmas (to enhance physical sputtering) with a moderate plasma flux density of 4x10 21 m-2s-1 to the targets. For the neon plasma exposure, the targets were biased to obtain an ion impact energy of 110 eV and the fluence was 1.6x10 25 m-2, for deuterium to ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Poster
Jahr 2017
Sprache Englisch
Identifikator KITopen ID: 1000075748
HGF-Programm 31.03.09; LK 01
Erschienen in 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, Düsseldorf, Germany, 15th - 19th May 2017
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