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@ARTICLE{Chikada:874402,
      author       = {Chikada, Takumi and Fujita, Hikari and Engels, Jan and
                      Houben, Anne and Mochizuki, Jumpei and Horikoshi, Seira and
                      Matsunaga, Moeki and Tokitani, Masayuki and Hishinuma,
                      Yoshimitsu and Kondo, Sosuke and Yabuuchi, Kiyohiro and
                      Schwarz-Selinger, Thomas and Terai, Takayuki and Oya,
                      Yasuhisa},
      title        = {{D}euterium permeation behavior and its iron-ion
                      irradiation effect in yttrium oxide coating deposited by
                      magnetron sputtering},
      journal      = {Journal of nuclear materials},
      volume       = {511},
      issn         = {0022-3115},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-01412},
      pages        = {560 - 566},
      year         = {2018},
      abstract     = {Tritium permeation through structural materials is a
                      critical issue in fusion reactors from the viewpoints of
                      sufficient fuel balance and radiological hazard. Ceramic
                      coatings have been investigated as tritium permeation
                      barrier for several decades; however, irradiation effects of
                      the coatings on permeation are not elucidated. In this work,
                      yttrium oxide coatings were fabricated on reduced activation
                      ferritic/martensitic steels by radio frequency magnetron
                      sputtering, and their microstructures and deuterium
                      permeation behaviors were investigated before and after
                      iron-ion irradiation at different temperatures. An
                      as-deposited coating had a columnar structure and
                      transformed into a granular one after annealing. An
                      amorphous layer formed near the coating-substrate interface
                      of irradiated coatings, and its thickness became thinner
                      with increasing irradiation temperature. Voids of
                      approximately 20 nm in diameter also formed in the
                      irradiated coatings. Deuterium permeation flux of the sample
                      irradiated to 1 dpa at room temperature was the lowest among
                      the unirradiated and irradiated samples, and a permeation
                      reduction factor indicated up to 390. The amorphous layer
                      disappeared after deuterium permeation measurements due to
                      damage recovery, while the voids remained and aggregated.
                      The irradiation damage would accelerate nucleation of the
                      crystal, resulting in a decrease of the permeation flux.},
      cin          = {IEK-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000447796300057},
      doi          = {10.1016/j.jnucmat.2018.06.008},
      url          = {https://juser.fz-juelich.de/record/874402},
}