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@ARTICLE{Wolf:889847,
      author       = {Wolf, Markus and Kakisawa, Hideki and Süß, Fabia and
                      Mack, Daniel Emil and Vaßen, Robert},
      title        = {{D}etermining {I}nterface {F}racture {T}oughness in {M}ulti
                      {L}ayered {E}nvironmental {B}arrier {C}oatings with {L}aser
                      {T}extured {S}ilicon {B}ond {C}oat},
      journal      = {Coatings},
      volume       = {11},
      number       = {1},
      issn         = {2079-6412},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2021-00455},
      pages        = {55 -},
      year         = {2021},
      abstract     = {In the high temperature combustion atmosphere inside of
                      aircraft turbines, the currently used ceramic matrix
                      composites require a protective environmental barrier
                      coating (EBC) to mitigate corrosion of the turbine parts.
                      Besides thermomechanical and thermochemical properties like
                      matching thermal expansion coefficient (CTE) and a high
                      resistance against corrosive media, mechanical properties
                      like a high adhesion strength are also necessary for a long
                      lifetime of the EBC. In the present work, the adhesion
                      between an air plasma sprayed silicon bond coat and a vacuum
                      plasma sprayed ytterbium disilicate topcoat was aimed to be
                      enhanced by a laser surface structuring of the Si bond coat.
                      An increase in interface toughness was assumed, since the
                      introduction of structures would lead to an increased
                      mechanical interlocking at the rougher bond coat interface.
                      The interface toughness was measured by a new testing
                      method, which allows the testing of specific interfaces. The
                      results demonstrate a clear increase of the toughness from
                      an original bond coat/topcoat interface (8.6 J/m2) compared
                      to a laser structured interface (14.7 J/m2). Observations in
                      the crack propagation indicates that the laser structuring
                      may have led to a strengthening of the upper bond coat area
                      by sintering. Furthermore, in addition to cohesive failure
                      components, adhesive components can also be observed, which
                      could have influenced the determined toughness.},
      cin          = {IEK-1},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {1241 - Gas turbines (POF4-124)},
      pid          = {G:(DE-HGF)POF4-1241},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000610012000001},
      doi          = {10.3390/coatings11010055},
      url          = {https://juser.fz-juelich.de/record/889847},
}