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@ARTICLE{Schmitz:891413,
      author       = {Schmitz, Janina and Litnovsky, A. and Klein, F. and
                      Lannoye, K De and Kreter, A. and Rasinski, M. and Breuer, U.
                      and Gonzalez-Julian, J. and Bram, M. and Coenen, J. W. and
                      Linsmeier, Ch},
      title        = {{O}n the plasma suitability of {WC}r{Y} smart alloys—the
                      effect of mixed {D}+{A}r/{H}e plasmas},
      journal      = {Physica scripta},
      volume       = {T171},
      issn         = {1402-4896},
      address      = {Stockholm},
      publisher    = {The Royal Swedish Academy of Sciences},
      reportid     = {FZJ-2021-01498},
      pages        = {014002 -},
      year         = {2020},
      abstract     = {Tungsten-chromium-yttrium (WCrY) smart alloys are foreseen
                      as first wall materials for future fusion devices such as
                      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 and Y causing W enrichment at the
                      surface. This paper reports on the results of the
                      simultaneous exposure of WCrY and pure W reference samples
                      to mixed D + $1\%Ar+5$ $\%He$ plasma in the linear plasma
                      device PSI-2. Further, a comparison with exposures to pure D
                      and D + 1 $\%Ar$ plasma is made. At incident ion energies of
                      120 eV, exposure to pure D plasma results in a W-enriched
                      alloy surface due to the preferential sputtering of Cr and
                      Y, while the addition of Ar leads to enhanced erosion for W
                      and WCrY and reduces the W enrichment in smart alloys. With
                      the addition of He to the plasma, erosion of WCrY is
                      enhanced compared to that of pure W. To investigate the
                      plasma impact on the oxidation behaviour, plasma-exposed and
                      reference samples were oxidised in controlled dry
                      oxygen-containing atmosphere at $1000\,^\circ {\rm{C}}$. The
                      sample geometry has a great impact on the oxidation
                      behaviour. Yet, it can be shown that the good
                      oxidation-suppressing properties of WCrY smart alloys are
                      preserved during plasma exposure.},
      cin          = {IEK-4 / IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)IEK-1-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174)},
      pid          = {G:(DE-HGF)POF3-174},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000520000600002},
      doi          = {10.1088/1402-4896/ab367c},
      url          = {https://juser.fz-juelich.de/record/891413},
}