TY  - JOUR
AU  - Schmitz, Janina
AU  - Litnovsky, Andrey M.
AU  - Klein, Felix
AU  - Tan, Xiaoyue
AU  - Breuer, Uwe
AU  - Rasinski, Marcin
AU  - Ertmer, Stephan
AU  - Kreter, Arkadi
AU  - Gonzalez-Julian, Jesus
AU  - Bram, Martin
AU  - Coenen, Jan Willem
AU  - Linsmeier, Christian
TI  - Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys
JO  - Tungsten
VL  - 1
SN  - 2661-8036
CY  - Singapore
PB  - Springer Singapore
M1  - FZJ-2019-03724
SP  - 2
PY  - 2019
N1  - Missing Journal: Tungsten (Tungsten) = 2661-8036 (import from CrossRef)
AB  - Tungsten-chromium-yttrium (WCrY) smart alloys are foreseen as the first wall material for future fusion devices such as Demonstration Power Plant (DEMO). While suppressing W oxidation during accidental conditions, they should behave like pure W during plasma operation due to preferential sputtering of the lighter alloying elements Cr, Y, and W enrichment of the surface. In this paper, the erosion performance of WCrY and W samples simultaneously exposed to deuterium (D) plasma with the addition of 1% of the projectile ions being argon (Ar) ions at an ion energy of 120 eV is compared. With reference to the previous experiments at 120 eV in pure D plasma, the erosion for both WCrY and W is enhanced by a factor of ~ 7. Adding Ar to the D plasma suppresses significant W enrichment previously found for pure D plasma. To investigate the impact of the plasma exposure onto the oxidation performance, plasma-exposed and non-exposed reference samples were oxidised in a dry atmosphere. Results show, on the one hand, that the oxidation suppression of WCrY in comparison to pure W is preserved during the plasma performance. On the other hand, it becomes evident that edge effects imposed by the geometry of the samples used in plasma experiments play a significant role for the oxidation behaviour.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000877212000005
DO  - DOI:10.1007/s42864-019-00016-7
UR  - https://juser.fz-juelich.de/record/863725
ER  -