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P: Fachverband Plasmaphysik
P 15: Helmholtz Graduate School II
P 15.25: Poster
Dienstag, 14. März 2017, 16:30–18:30, HS Foyer
Progression of the tungsten-fibre reinforced tungsten composite production process towards a reproducible dense matrix — •Hanns Gietl1,2, Johann Riesch1, Jan W. Coenen3, Leonard Raumann3, Philipp Huber4, Till Höschen1, and Rudolf Neu1,2 — 1Max-Planck-Institut für Plasmaphysik, 85748 Garching — 2Technische Universität München, 85748 Garching — 3Forschungszentrum Jülich, IEK4, 52425 Jülich — 4Lehrstuhl für Textilmaschinenbau und Institut für Textiltechnik, 52062 Aachen
For the use in a fusion device tungsten has unique properties such as low sputter yield, high melting point and low activation. The brittleness below the ductile-to-brittle transition temperature and the embrittlement during operation are the main drawbacks for the use of pure tungsten. Tungsten fibre-reinforced tungsten composites overcome this problem by utilizing extrinsic mechanisms to improve the. The next step is the conceptual proof for the applicability in fusion reactors by the production of larger components and for testing them in cyclic high heat flux. A dense matrix is one of the major issues for the production of such mock ups.
In this study the possibilities of forming a dense tungsten matrix in between the reinforcing wires by geometry optimization are investigated. Weaving processes were implemented in the fibre-preform production and different fabrics were produced. These fabrics were then incorporated into a tungsten matrix via a chemical vapor deposition (CVD) process. The resulting composites were examined by microstructural analysis.