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DS: Fachverband Dünne Schichten
DS 36: Poster Session I
DS 36.100: Poster
Donnerstag, 19. März 2015, 09:30–12:00, Poster A
Yttrium Oxide Coatings as Tritium Permeation Barriers for Fusion Energy Research — •Jan Engels, Anne Houben, and Christian Linsmeier — Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, 42425 Jülich, Germany
In fusion power plants the hydrogen isotopes deuterium and tritium are used as fuel. To prevent the loss of fuel and the accumulation of radioactive tritium in the first wall, the cooling system, and other parts of the fuel vessel, a tritium permeation barrier is necessary. Oxide thin films, e.g. Er2O3 and Y2O3, are promising candidates as tritium permeation barrier layers. In this contribution magnetron sputtered Y2O3 thin films on Si-wafers are presented. They are annealed at 600 ∘C to achieve a plenary cubic phase of the Y2O3 system. The phase of the thin films is investigated by X-ray diffraction. To be able to quantify the permeation reduction factor of the Y2O3 thin films, the construction of a new permeation measurement setup is in progress. Therefore, the oxide layers are deposited on Eurofer97, a reduced activation steel developed for fusion applications. Comparing the permeation flux through a bare substrate and a coated substrate, the permeation reduction factor can be determined.