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@PHDTHESIS{Wei:842212,
      author       = {Wei, Jianping},
      title        = {{M}echanical {C}haracterization of {S}olid {O}xide {F}uel
                      {C}ells and {S}ealants},
      volume       = {391},
      school       = {RWTH Aachen},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2018-00468},
      isbn         = {978-3-95806-266-5},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {II, 151 S.},
      year         = {2017},
      note         = {RWTH Aachen, Diss., 2016},
      abstract     = {Solid oxide fuel cells (SOFCs) have a high application
                      potential due to the evolved demands in a global energy
                      network. Characterization of thermo-mechanical aspects, in
                      particular elastic, fracture and creep behavior of sealants
                      and anode substrates, is essential to warrant reliable
                      production and operation of planar SOFCs. In this respect,
                      several mechanical parameters have been determined and
                      analyzed to get insight into the mechanical behavior and
                      possible issues for joining, thermal cycling and long term
                      reliability of SOFC stacks and systems. For anode
                      substrates, facture toughness and creep behavior as major
                      mechanical aspects were studied. In this respect, the room
                      and elevated temperature fracture toughness of two typical
                      anode substrate variants (NiO-3YSZ and NiO-8YSZ) were
                      characterized in oxidized and reduced state, some selected
                      tests were concluded for a re-oxidized state. Elevated
                      temperature creep studies concentrated on Ni-8YSZ composites
                      with different porosities, where different loading
                      configurations have been compared to assess effects of
                      compressive and tensile stresses. The interpretation and
                      analysis of the data were based on analytical and finite
                      element analysis. Leakage of sealants will lead to a
                      malfunction of the entire system, hence the structural
                      integrity of sealants is crucial for a reliable operation of
                      SOFC stacks and systems. In particular, Ag particle and YSZ
                      fiber reinforced sealants, based on a glass matrix material
                      developed in Jülich, were studied in stack operation
                      relevant as-sintered and annealed state. Sealants supplied
                      by Ceramics and Glass Institute (CSIC, Madrid, Spain) were
                      also characterized and compared. Work concentrated on
                      characterization of fracture stress at elevated temperatures
                      on specimens mainly in a head-to-head geometry and
                      complementary torsion tests to investigate the shear
                      strength. The results of mechanical analysis were supported
                      by advanced microstructural characterization and
                      fractography to gain insight into annealing and filler
                      reinforcement effects.},
      cin          = {IEK-2},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/842212},
}