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Advertising division: IEK-4 - Plasma Physics
Reference number: 2019M-044, Physics, materials science

Master thesis: Influence of deuterium loading on recrystallization of tungsten

Tungsten is a main candidate as a plasma facing material (PFM) in current fusion devices. One of main drawback of tungsten as PFM is brittleness when recrystallized. Limitation of tungsten’s recrystallization would influence its lifetime and improve the fusion device performance. The interaction of deuterium during plasma discharge could lead to mitigation of recrystallization tungsten.

The project aims to understand the effect of deuterium interaction with tungsten and its effect on tungsten’s recrystallization.

During this project tungsten will be exposed to deuterium plasma in linear plasma device PSI-2. Before and after plasma loading surface morphology, grain size and orientation will investigated by means of electron microscopy techniques. Additionally microhardness and stress state will be checked. Well characterized samples loaded with deuterium will undergo further annealing. After annealing second round of samples characterization (both loaded and non-loaded with deuterium) would allow to identify the effect on tungsten recrystallization.

The ideal candidate should have:

  • Interest in materials science
  • Experience with materials characterization

Contact Person:
Dr. Marcin Rasinski
Forschungszentrum Jülich GmbH
Institut für Energie- und Klimaforschung
IEK-4: Plasmaphysik
52425 Jülich
Telefon: +49-2461 61 3121