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@ARTICLE{Youchison:878800,
      author       = {Youchison, D. and W Coenen, J. and T Gray, T. and
                      Lumsdaine, A. and W Klett, J. and Jolly, B. and Gehrig, M.
                      and Brezinsek, S. and Rsinski, M.},
      title        = {{D}evelopment and {P}erformance of {T}ungsten-{C}oated
                      {G}raphitic {F}oam for {P}lasma-{F}acing {C}omponents},
      journal      = {Fusion engineering and design},
      volume       = {75(6)},
      number       = {6},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-03053},
      pages        = {551-557},
      year         = {2019},
      abstract     = {High-density graphitic foam is an ideal low-Z plasma-facing
                      material for deuterium-deuterium plasma experiments where
                      tritium codeposition is not an issue. However, like all
                      carbon, graphitic foam suffers from a precipitous drop in
                      thermal conductivity at high temperatures, >600°C. To
                      mitigate these problems, functionally graded layers of
                      tungsten can be deposited to a thickness of 2 to 4 mm onto
                      the plasma side of the foam using chemical vapor deposition.
                      The graphitic foam then acts as a high-conductivity heat
                      sink at temperatures below 600°C for the thin high-Z armor
                      coating. The overall component weighs 18 times less than a
                      comparable volume of tungsten and lacks the coefficient of
                      thermal expansion joining issues between the CuCrZr tubing
                      and the tungsten. This paper discusses the coating
                      development and characterization and presents the results of
                      recent plasma exposures in W7-X. It also reports on
                      computational fluid dynamics heat transfer modeling and
                      preparations for high heat flux testing of mock-ups. This
                      hybrid plasma-facing component (PFC) consisting of
                      innovative engineered materials may be a cost-effective,
                      actively cooled solution for the divertors and other PFCs in
                      long-pulse machines like W7-X and WEST.},
      cin          = {IEK-4},
      ddc          = {530},
      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:000478073000017},
      doi          = {10.1080/15361055.2019.1607706},
      url          = {https://juser.fz-juelich.de/record/878800},
}