%0 Journal Article
%A Litnovsky, Andrey
%A Schmitz, Janina
%A Klein, Felix
%A De Lannoye, Karen
%A Weckauf, Sophie
%A Kreter, Arkadi
%A Rasinski, Marcin
%A Coenen, Jan W.
%A Linsmeier, Christian
%A Gonzalez-Julian, Jesus
%A Bram, Martin
%A Povstugar, Ivan
%A Morgan, Thomas
%A Nguyen-Manh, Duc
%A Gilbert, Mark
%A Sobieraj, Damian
%A Wróbel, Jan S.
%T Smart Tungsten-based Alloys for a First Wall of DEMO
%J Fusion engineering and design
%V 159
%@ 0920-3796
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2021-01484
%P 111742 -
%D 2020
%X During an accident with loss-of-coolant and air ingress in DEMO, the temperature of tungsten first wall cladding may exceed 1000 °C and remain for months leading to tungsten oxidation. The radioactive tungsten oxide can be mobilized to the environment at rates of 10–150 kg per hour. Smart tungsten-based alloys are under development to address this issue. Alloys are aimed to function as pure tungsten during regular plasma operation of DEMO. During an accident, alloying elements will create a protective layer, suppressing release of W oxide.Bulk smart alloys were developed by using mechanical alloying and field-assisted sintering technology. The mechanical alloying process was optimized leading to an increased powder production by at least 40 %. Smart alloys and tungsten were tested under a variety of DEMO-relevant plasma conditions. Both materials demonstrated similar sputtering resistance to deuterium plasma. Under accident conditions, alloys feature a 40-fold reduction of W release compared to that of pure tungsten.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000580835200012
%R 10.1016/j.fusengdes.2020.111742
%U https://juser.fz-juelich.de/record/891395