This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/24174 in citations.
Studies of oxidation resistant tungsten alloys at temperatures of 1100 K to 1475 K
Studies of oxidation resistant tungsten alloys at temperatures of 1100 K to 1475 K
Electricity from nuclear fusion is a promising approach. An accidental scenario of a fusion power plant assumes a loss of coolant and a damaged reactor vessel. In this case temperatures beyond 1200K of the plasma-facing materials are expected. This thesis investigates W-Cr-Y alloys to provide safet...
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Personal Name(s): | Klein, Felix (Corresponding author) |
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Contributing Institute: |
Plasmaphysik; IEK-4 |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2019
|
Physical Description: |
158 S. |
Dissertation Note: |
Dissertation, Universität Bochum, 2019 |
ISBN: |
978-3-95806-444-7 |
Document Type: |
Book Dissertation / PhD Thesis |
Research Program: |
Plasma-Wall-Interaction |
Series Title: |
Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment
482 |
Link: |
OpenAccess |
Publikationsportal JuSER |
Electricity from nuclear fusion is a promising approach. An accidental scenario of a fusion power plant assumes a loss of coolant and a damaged reactor vessel. In this case temperatures beyond 1200K of the plasma-facing materials are expected. This thesis investigates W-Cr-Y alloys to provide safety after such an accident. It is shown how Cr forms an oxide layer by diffusion that suppresses the release of WO$_{3}$ at temperatures up to 1273K in dry and humid air. Suppression by more than one order of magnitude as compared to W is measured for the first time. Y is issential for suppression of WO$_{3}$ release and is detected for the first time at the oxide grain boundaries and in the form of YCrO$_{3}$ nano-particles. An understanding of the oxidation in dependence on morphology, microstructure, composition and the envronmental conditions is developed using experimental and theoretical studies of the interaction of the involved elements. |