München 2019 – scientific programme
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P: Fachverband Plasmaphysik
P 12: Plasma Surface Interaction II - Helmholtz Graduate School IV
P 12.2: Talk
Tuesday, March 19, 2019, 17:00–17:15, HS 20
Development of components for fiber reinforced tungsten (Wf/W) produced by chemical vapor deposition — •Daniel Schwalenberg1,3, Jan Willem Coenen1, Johann Riesch2, Leonard Raumann1, Yiran Mao1, Alexis Terra1, Till Höschen2, Rudolf Neu2,3, and Christian Linsmeier1 — 1Institut für Energie und Klimaforschung, Forschungszentrum Jülich GmbH, 52425 Jülich — 2Max-Plank-Institut für Plasmaphysik, 85748 Garching b. München — 3Technische Universität München, 85748 Garching b. München
The harsh conditions at the divertor in fusion reactors lead to very high demands for the first wall materials. Due excellent thermal properties, low sputter yield, hydrogen retention and low activation tungsten is the most promising candidate. The biggest issue for tungsten is the brittleness, which can lead to catastrophic failures of components. To compensate for the brittle behavior, a tungsten fiber reinforced composite material (Wf/W) is being developed. Because of the production process, the tungsten fibers are ductile. Together with a tungsten matrix they can be combined to form a pseudo-ductile material. To further characterize and improve the material, larger amounts of Wf/W have to be produced. Therefore the experimental setup was upgraded and the production speed increased. The next steps are first to establish a process to produce large amounts of Wf/W and second to determine the needed properties of the material for the application as divertor material. So that the material can be improved to meet the needed requirements for the implementation as a divertor component.