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@ARTICLE{Vassen:283681,
      author       = {Vassen, Robert and Grünwald, N. and Marcano, D. and
                      Menzler, N. H. and Mücke, R. and Sebold, D. and Sohn, Y. J.
                      and Guillon, Olivier},
      title        = {{A}ging of atmospherically plasma sprayed chromium
                      evaporation barriers},
      journal      = {Surface and coatings technology},
      volume       = {291},
      issn         = {0257-8972},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2016-01978},
      pages        = {115 - 122},
      year         = {2016},
      abstract     = {Chromium evaporation barriers are frequently used in solid
                      oxide fuel cells to protect the porous cathode from chromium
                      poisoning. Volatile chromium species are generated at the
                      operation temperature of about 600–900 °C in a humid
                      atmosphere for chromia scale forming steels as interconnect
                      materials. In order to reduce this effect, barrier coatings
                      are applied, often by atmospheric plasma spraying. However,
                      also in these coatings microstructural changes as
                      densification and in parallel formation of large pores have
                      been observed. In order to clarify these mechanisms plasma
                      sprayed Mn1.0 Co1.9Fe0.1O4 (“MCF”) are deposited on
                      ferritic steels and furthermore coated with a perovskite
                      based contact layer as used in stack build-up. These
                      coatings are annealed in air up to 1000 h and the
                      microstructural changes and bending of the samples are
                      studied. The results show increasing bending with increasing
                      aging time. High temperature curvature measurements indicate
                      that the amount of bending is not significantly dependent on
                      temperature. As an explanation the creep deformation of the
                      substrate/coating system at high temperatures due to
                      compressive stress levels in the coating is given. The
                      origin of the stress is related to phase changes in
                      combination with the oxidation of the coatings. In addition,
                      interdiffusion and densification processes are discussed.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113) / HITEC - Helmholtz Interdisciplinary Doctoral
                      Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-113 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000389687600014},
      doi          = {10.1016/j.surfcoat.2016.02.005},
      url          = {https://juser.fz-juelich.de/record/283681},
}