TY  - JOUR
AU  - Litnovsky, Andrey
AU  - Schmitz, Janina
AU  - Klein, Felix
AU  - De Lannoye, Karen
AU  - Weckauf, Sophie
AU  - Kreter, Arkadi
AU  - Rasinski, Marcin
AU  - Coenen, Jan W.
AU  - Linsmeier, Christian
AU  - Gonzalez-Julian, Jesus
AU  - Bram, Martin
AU  - Povstugar, Ivan
AU  - Morgan, Thomas
AU  - Nguyen-Manh, Duc
AU  - Gilbert, Mark
AU  - Sobieraj, Damian
AU  - Wróbel, Jan S.
TI  - Smart Tungsten-based Alloys for a First Wall of DEMO
JO  - Fusion engineering and design
VL  - 159
SN  - 0920-3796
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2021-01484
SP  - 111742 -
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000580835200012
DO  - DOI:10.1016/j.fusengdes.2020.111742
UR  - https://juser.fz-juelich.de/record/891395
ER  -