guest ::
| Home > Workflow collections > Publication Charges > Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys |
| Home > Workflow collections > Publication Charges > Argon-seeded plasma exposure and oxidation performance of tungsten-chromium-yttrium smart alloys |
| Journal Article | FZJ-2019-03724 |
; ; ; ; ; ; ; ; ; ; ;
2019
Springer Singapore
Singapore
This record in other databases: 
Please use a persistent id in citations: http://hdl.handle.net/2128/22702 doi:10.1007/s42864-019-00016-7
Abstract: 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.
; 
|
The record appears in these collections: |
PDF
PDF (PDFA)