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@INPROCEEDINGS{Gatzen:860419,
      author       = {Gatzen, Caren and Guillon, Olivier and Mack, Daniel Emil
                      and Vassen, Robert},
      title        = {{D}evelopment of environmental barrier coatings for
                      {A}l2{O}3/{A}l2{O}3 {CMC}s with improved {A}dhesion by
                      texturing with laser ablation},
      reportid     = {FZJ-2019-01189},
      year         = {2018},
      abstract     = {Al2O3 /Al2O3 ceramic matrix composites (CMC) are candidate
                      materials for high-temperature applications such as gas
                      turbines. As water vapor corrosion of oxide/oxide CMC is a
                      major issue, the application of suitable environmental
                      barrier coatings (EBC) is inevitable. Besides the gas
                      tightness a good adhesion of the EBC is a crucial aspect for
                      providing an effective barrier against the combustion
                      atmosphere. Due to the brittleness of the ceramic matrix
                      conventional surface treatments like grinding and
                      sandblasting fail to increase roughness without causing
                      damage to the substrate. Therefore there is a need for new
                      methods of surface preparation of CMCs.This work examines
                      the suitability of surface preparation with laser ablation
                      for use prior to air plasma spraying (APS) on an
                      oxide/oxide-CMC. Laser ablation allows controlling of the
                      surface’s structure and roughness. The effects of
                      different laser parameters on the alumina surface were
                      examined and a variety of different structures, for example
                      a honeycomb or a cauliflower like structure, were
                      prepared.The laser treated surfaces were coated with
                      potential EBC-candidates, such as Y2O3 and Gd2Zr2O7 and the
                      impact of laser textures on the coating adhesion was
                      examined. Evaluation of the coated samples was done by
                      pull-off adhesion testing and thermal cycling. Results
                      indicate that laser pretreatment helps to increase the
                      adhesion strength of the EBC-system.},
      month         = {Jun},
      date          = {2018-06-24},
      organization  = {Thermal Barrier Coatings V, Irsee
                       (Germany), 24 Jun 2018 - 29 Jun 2018},
      subtyp        = {Other},
      cin          = {IEK-1 / JARA-ENERGY},
      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)24},
      url          = {https://juser.fz-juelich.de/record/860419},
}