This title appears in the Scientific Report :
2019
Please use the identifier:
http://hdl.handle.net/2128/22702 in citations.
Please use the identifier: http://dx.doi.org/10.1007/s42864-019-00016-7 in citations.
Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys
Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys
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...
Saved in:
Personal Name(s): | Schmitz, Janina (Corresponding author) |
---|---|
Litnovsky, Andrey M. / Klein, Felix / Tan, Xiaoyue / Breuer, Uwe / Rasinski, Marcin / Ertmer, Stephan / Kreter, Arkadi / Gonzalez-Julian, Jesus / Bram, Martin / Coenen, Jan Willem / Linsmeier, Christian | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 Analytik; ZEA-3 Plasmaphysik; IEK-4 |
Published in: | Tungsten, 1 (2019) S. 2 |
Imprint: |
Singapore
Springer Singapore
2019
|
DOI: |
10.1007/s42864-019-00016-7 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Link: |
Get full text Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1007/s42864-019-00016-7 in citations.
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. |