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Ab initio study of hydrogen behavior in titanium beryllides

Bachurin, D. V. 1; Stihl, C.; Vladimirov, P. V. ORCID iD icon 1
1 Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

An interest in titanium beryllides as candidate materials for advanced neutron multiplier for the Helium Cooled Pebble Bed breeding blanket of European DEMO fusion reactor is related to their lower tritium retention, lower swelling and higher oxidation resistance in comparison with pure beryllium. The latter was initially suggested as neutron multiplier in the International Thermonuclear Experimental Reactor (ITER) and for the above reasons has a number of limitations compared to beryllides.
One of the most important questions is how much weaker tritium, which is formed as a result of the interaction of high-energy neutrons with the pebbles is bound in titanium beryllides in contrast to pure beryllium. Such an interaction awakes formation of helium bubbles and degradation of the material properties. One of the main promising methods for studying the behavior of hydrogen in titanium beryllides is first-principles modeling technique based on density functional theory.
The present work is devoted to ab initio study of hydrogen (isotope effects were neglected and hydrogen was considered instead of tritium) behavior in three titanium beryllides (Be2Ti, Be17Ti2, Be12Ti). ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000160263
Veröffentlicht am 24.07.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2023
Sprache Englisch
Identifikator ISBN: 978-3-7315-1284-4
KITopen-ID: 1000160263
HGF-Programm 31.13.04 (POF IV, LK 01) In Vessel Components
Erschienen in Proceedings of the 15th International Workshop on Beryllium Technology (BeWS-15) September, 14-15, 2022, Karlsruhe, Germany(KIT Scientific Reports ; 7764). Ed.: V. Pavel; G. Ramil
Veranstaltung 15th International Workshop on Beryllium Technology (BeWS 2022), Karlsruhe, Deutschland, 14.09.2022 – 15.09.2022
Verlag Karlsruher Institut für Technologie (KIT)
Seiten 227-237
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