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@ARTICLE{Grnwald:851466,
      author       = {Grünwald, Nikolas and Sohn, Yoo Jung and Yin, Xiaoyan and
                      Menzler, Norbert H. and Guillon, Olivier and Vaßen, Robert},
      title        = {{M}icrostructure and {P}hase {E}volution of {A}tmospheric
                      {P}lasma {S}prayed {M}n-{C}o-{F}e {O}xide {P}rotection
                      {L}ayers for {S}olid {O}xide {F}uel {C}ells},
      journal      = {Journal of the European Ceramic Society},
      volume       = {39},
      issn         = {0955-2219},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2018-05102},
      pages        = {449-460},
      year         = {2019},
      abstract     = {Dense protective layers are needed to reduce
                      chromium-related degradation in SOFC stacks. In particular,
                      atmospheric plasma sprayed (APS) Mn1.0Co1.9Fe0.1O4 (MCF)
                      coatings demonstrated low degradation rates in stack tests.
                      We show that short-term annealing in air induces crack
                      healing within these coatings. Parallel to this effect, a
                      phase transformation is observed originating from oxidation
                      that proceeds by solid state-diffusion. The present
                      contribution reveals the basic mechanisms of the
                      microstructural and phase changes of coatings in long-term
                      annealing tests of up to 10,000 h at 700 °C. The layer
                      develops differently at the air-facing surface and in the
                      bulk. Due to cation deficiency, oxidation is dominated by
                      cation outward diffusion, leading to a Co-enriched surface
                      layer. The bulk displays a fine distribution of the initial
                      (rock salt) and the final (spinel) phases. Understanding the
                      mechanisms leading to these irreversible changes enables
                      predictions to be made concerning durable protectivecoatings
                      in SOFCs.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000450379400040},
      doi          = {10.1016/j.jeurceramsoc.2018.08.027},
      url          = {https://juser.fz-juelich.de/record/851466},
}