| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Solving the Brittleness Problem of Tungsten - Tungsten Fibre-reinforced Tungsten Composites |
| Author(s) |
Johann Riesch, Jan W. Coenen, Bailey Curzadd, Maximilian Fuhr, Lauren Garisson, Hanns Gietl, Henri Greuner, Till Höschen, Yiran Mao, Wolfgang Pantleon, Leonard Raumann, Daniel Schwalenberg, Thomas Schwarz-Selinger, Dmitry Terentyev, Rudolf Neu |
| On-Site Speaker (Planned) |
Johann Riesch |
| Abstract Scope |
Due to its unique property combination tungsten materials are the preferred choice for high-heat-flux-loaded areas in future fusion power plants. However, tungsten has a high brittle to ductile transition temperature and is prone to operational embrittlement due to high temperature and/or fast neutron irradiation. Tungsten fibre-reinforced tungsten composites utilize extrinsic mechanisms to improve the fracture toughness and thus mitigate this drawback.
In this contribution, we will present the main characteristics and properties of this new composite material. Drawn potassium-doped W wire is used as ductile, high strength fibrous reinforcement. Engineered fibre-matrix interfaces ensure the desired composite behaviour. The tungsten matrix is formed around woven long fibres or randomly orientated short fibres by chemical vapour deposition or powder metallurgy, respectively. A review will be given of the material’s development, starting from the first ideas up to recent high heat flux tests and investigations after neutron irradiation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Composites, |