DPG Phi
Verhandlungen
Verhandlungen
DPG

Greifswald 2024 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

P: Fachverband Plasmaphysik

P 3: Plasma Wall Interaction I

P 3.6: Vortrag

Montag, 26. Februar 2024, 15:30–15:45, ELP 6: HS 3

Low Pressure Plasma Spraying of Tungsten on Plasma Facing Components for Future Fusion Devices — •Gunnar Schmidtmann1,2, Andrey Litnovsky1, Jan Willem Coenen1, Robert Vaßen2, Sebastijan Brezinsek1, Christian Linsmeier1, Olivier Guillon2, and Georg Mauer21Forschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung - Plasmaphysik (IEK-4), 52425 Jülich, Germany — 2Forschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung - Werkstoffsynthese und Herstellungsverfahren (IEK-1), 52425 Jülich, Germany

Tungsten is currently the baseline plasma-facing material (PFM) for future fusion devices. Despite its advantageous properties, tungsten gets damaged under the extreme plasma conditions, which can lead to a reduced lifetime of the plasma facing components (PFC) or the outage of the whole fusion reactor. As repairing is time and resource intense, Low Pressure Plasma Spraying emerges viable as a fast and affordable solution to restore the PFM and repair damages. Pre-heating of the different substrate materials: Carbon fibre composite, tungsten and Eurofer (T < 740 °C), helped to mitigate residual stresses caused by the thermal mismatch between coating and substrate. Quality parameters such as porosity below 5 % and number of defects were evaluated using digital image analysis. Further characterization was performed to obtain more information on the surface roughness and a coating thickness of at least 100 *m. In future work, selected coatings will be tested under fusion-relevant conditions to obtain a lifetime prediction and to allow to infer further possible improvements.

Keywords: Low Pressure Plasma Spraying; Tungsten coatings; Plasma facing material

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Greifswald