%0 Journal Article
%A Schmitz, Janina
%A Litnovsky, Andrey M.
%A Klein, Felix
%A Tan, Xiaoyue
%A Breuer, Uwe
%A Rasinski, Marcin
%A Ertmer, Stephan
%A Kreter, Arkadi
%A Gonzalez-Julian, Jesus
%A Bram, Martin
%A Coenen, Jan Willem
%A Linsmeier, Christian
%T Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys
%J Tungsten
%V 1
%@ 2661-8036
%C Singapore
%I Springer Singapore
%M FZJ-2019-03724
%P 2
%D 2019
%Z Missing Journal: Tungsten (Tungsten) = 2661-8036 (import from CrossRef)
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000877212000005
%R 10.1007/s42864-019-00016-7
%U https://juser.fz-juelich.de/record/863725