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@ARTICLE{Jamin:807068,
      author       = {Jamin, Christine and Rasp, Tobias and Kraft, Torsten and
                      Guillon, Olivier},
      title        = {{C}onstrained {S}intering of {A}lumina {S}tripes on {R}igid
                      {S}ubstrates: {E}ffect of {S}ubstrate {R}oughness and
                      {C}oating},
      journal      = {Journal of the American Ceramic Society},
      volume       = {98},
      number       = {12},
      issn         = {0002-7820},
      address      = {Oxford [u.a.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {FZJ-2016-02099},
      pages        = {3988 - 3995},
      year         = {2015},
      abstract     = {Micromolding in capillaries has been used to fabricate
                      alumina stripes on smooth (Ra = 0.5 nm) and rough substrates
                      (Ra = 900 nm). Different lateral (10–500 μm) and vertical
                      stripe dimensions (8–27 μm) were used to study the
                      influence of substrate roughness (smooth and rough sapphire)
                      and substrate material (platinum coated and plain sapphire)
                      on sintering behavior. Alumina stripes experience edge
                      delamination during sintering on a rigid substrate
                      independent of substrate roughness. However, enhanced
                      substrate roughness reduced delamination length by half and
                      lowered lateral strains by up to 0.10. Grooves in the rough
                      substrate were found to be responsible for this feature as
                      they act as crack propagation barriers and generate local
                      density minima. Accompanying discrete element simulations
                      revealed a localized triaxial stress state at the grooves of
                      a sinusoidal-shaped substrate interface as the main cause of
                      the density minima. Platinum interlayers also resulted in
                      reduced delamination by $40\%$ in some stripe geometries
                      while density was enhanced by $4\%$ and lateral strains
                      doubled in some geometries. Creep of the metal layer during
                      sintering is thought to be the reason for this seemingly
                      contradictory behavior.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000368076500059},
      doi          = {10.1111/jace.13799},
      url          = {https://juser.fz-juelich.de/record/807068},
}