This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1088/0031-8949/2016/T167/014013 in citations.
Morphology and composition of Fe–W coatings after deuterium plasma exposure as a model system for RAFM steels
Morphology and composition of Fe–W coatings after deuterium plasma exposure as a model system for RAFM steels
A model system representing the RAFM steel EUROFER-97 is produced by magnetron sputterdeposition of iron and 1.5 at% tungsten and investigated in order to study the consequences ofplasma exposures. The alloy is deposited as coatings with a thickness of 400 nm onpolycrystalline, high purity iron subs...
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Personal Name(s): | Rasinski, M. (Corresponding author) |
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Möller, S. / Steffens, J. / Unterberg, B. / Sugiyama, K. / Schwarz-Selinger, T. / Kreter, A. / Linsmeier, Ch | |
Contributing Institute: |
Plasmaphysik; IEK-4 Finanzen; Kostenrechnung, Kostenstellenrechnung; F-KS |
Published in: | Physica scripta, T167 (2016) S. 014013 - |
Imprint: |
Bristol
IoP Publ.
2016
|
DOI: |
10.1088/0031-8949/2016/T167/014013 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
A model system representing the RAFM steel EUROFER-97 is produced by magnetron sputterdeposition of iron and 1.5 at% tungsten and investigated in order to study the consequences ofplasma exposures. The alloy is deposited as coatings with a thickness of 400 nm onpolycrystalline, high purity iron substrates. To understand the erosion mechanisms andmorphology changes the coatings were exposed to a linear plasma device with an ion flux of3×1021 D+ m−2 s−1 and an electron temperature of 13 eV. Samples were exposed at sampletemperatures of about 420 and 770 K at incident ion energy of 30 eV (floating potential), 70 and190 eV. Additionally, the effect of ion fluence was investigated. The coatings before and afterplasma exposure were investigated by electron microscopy and glow discharge optical emissionspectroscopy (GD-OES). Microstructure observation revealed a complex morphology withdistinct sharp spikes formed under the plasma exposure at incident ion energies of 70 and190 eV. The tungsten enrichment by a factor of 3 in the spikes was visualized by backscatterelectron observation and confirmed by both energy-dispersive x-ray spectroscopy and GD-OES.No visible erosion and, by that, tungsten enrichment was observed after the plasma exposure atan incident ion energy of 30 eV, as expected since it is below the threshold energy for sputteringof iron. |