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@ARTICLE{DorowGerspach:911996,
      author       = {Dorow-Gerspach, Daniel and Derra, Thomas and Gipperich,
                      Marius and Loewenhoff, Thorsten and Pintsuk, Gerald and
                      Terra, Alexis and Weber, Thomas and Wirtz, Marius and
                      Linsmeier, Christian},
      title        = {{P}rogress in the {R}ealization of µ-{B}rush {W} for
                      {P}lasma-{F}acing {C}omponents},
      journal      = {Journal of nuclear engineering},
      volume       = {3},
      number       = {4},
      issn         = {2673-4362},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2022-05226},
      pages        = {333 - 341},
      year         = {2022},
      abstract     = {During the service life of plasma-facing components, they
                      are exposed to cyclic stationary and transient thermal
                      loads. The former causes thermal fatigue and potentially
                      detachment between the plasma-facing material tungsten and
                      the structural Cu-based materials (divertor) and steel
                      (first wall). The latter causes surface roughening,
                      cracking, or even melting, which could drastically increase
                      the erosion rate. Employing thin flexible W wires (Ww) with
                      a diameter of a few hundred µm can reduce mechanical
                      stresses, and we demonstrated their crack resilience against
                      transient loads within first proof of principle studies.
                      Here, status and future paths towards the large-scale
                      production of such Ww assemblies, including techniques for
                      realizing feasible joints with Cu, steel, or W, are
                      presented. Using wire-based laser metal deposition, we were
                      able to create a homogeneous and shallow infiltration of
                      about 200 µm of the Ww assembly with steel. A
                      high-heat-flux test on such a µ-brush (10 × 10 × 5 mm3 Ww
                      on a ~0.5 mm thick steel layer) using 5 MW/m2 for 2000
                      cycles was performed without loss of any wire.
                      Microstructural examination after and infrared analysis
                      during the test showed no significant signs of degradation
                      of the joint},
      cin          = {IEK-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001188964400001},
      doi          = {10.3390/jne3040020},
      url          = {https://juser.fz-juelich.de/record/911996},
}