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@ARTICLE{Heyl:1007221,
      author       = {Heyl, Hanna and Mack, Daniel Emil and Tandler, Martin and
                      Schrüfer, Susanne and Vaßen, Robert},
      title        = {{E}ffects of laser-structured and {APS} flash-coated
                      {C}o{N}i{C}r{A}l{Y} bondcoats on the furnace cycle lifetime
                      of double-layered {Y}2{O}3-stabilized {Z}r{O}2/{M}g{A}l2{O}4
                      abradable coatings},
      journal      = {Surface and coatings technology},
      volume       = {464},
      issn         = {0257-8972},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2023-01993},
      pages        = {129513 -},
      year         = {2023},
      abstract     = {Improving the mechanical interlocking within the layers of
                      an abradable and a thermal barrier coating (TBC) plays a key
                      role in extending its lifetime. This can be achieved by
                      increasing the surface profile of the bondcoat using laser
                      ablation and flash coating. To this end, this work analyzes
                      the impact of laser-ablated and atmospherically
                      plasma-sprayed flash-coated CoNiCrAlY bondcoats on the
                      furnace cycle lifetime of double-layered Y2O3-stabilized
                      ZrO2/MgAl2O4 abradable coatings. The three different
                      bondcoat modifications studied in this work are, namely, a
                      laser-ablated vacuum plasma sprayed bondcoat with a
                      square-shaped grid surface structure, a laser-ablated vacuum
                      plasma sprayed bondcoat with an additional atmospheric
                      plasma sprayed fine flash-coat for increased
                      micro-roughness, and a standard vacuum plasma sprayed
                      bondcoat with a coarse and a subsequent fine atmospherically
                      plasma sprayed flash-coat. As a reference sample, a standard
                      vacuum plasma sprayed bondcoat is used. A detailed analysis
                      of the optimal laser parameters to manufacture homogenous
                      laser-structured bondcoats is presented, while furnace cycle
                      tests at 1100 °C are used to identify the performance of
                      the different bondcoat/ceramic topcoat systems. The obtained
                      results show that the cycling lifetime improved for all
                      three modified bondcoats compared to the standard bondcoat.
                      However, the two laser-structured bondcoats present the most
                      significant increase by almost three times. X-ray
                      diffraction and scanning electron microscope results further
                      reveal that the laser ablation process has no considerable
                      effect on the material composition. Furthermore, roughness
                      measurements highlight that the bondcoat's macro-roughness
                      has a more pronounced effect on the cycling life than its
                      micro-roughness. The furnace cycle tests, moreover, show
                      that both laser-structured bondcoats have different failure
                      modes, but similar cycling lifetime.},
      cin          = {IEK-1},
      ddc          = {670},
      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:000993771600001},
      doi          = {10.1016/j.surfcoat.2023.129513},
      url          = {https://juser.fz-juelich.de/record/1007221},
}