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@ARTICLE{Karger:16594,
      author       = {Karger, M. and Vaßen, R. and Stöver, D.},
      title        = {{A}tmospheric plasma sprayed thermal barrier coatings with
                      high segmentation crack densities: {S}praying process,
                      microstructure and thermal cycling behavior},
      journal      = {Surface and coatings technology},
      volume       = {206},
      issn         = {0257-8972},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {PreJuSER-16594},
      pages        = {16 - 23},
      year         = {2011},
      note         = {This work was partially supported by the EC ("TOPPCOAT",
                      Project No. AST4-CT-2005-516149). The author thanks K.H.
                      Rauwald, R. Laufs and F. Vondahlen for plasma spraying the
                      specimen and M. Kappertz, Dr. D. Sebold and Dr. D.E. Mack
                      for their experimental contribution to this work.},
      abstract     = {Thermal barrier coatings (TBCs) with high strain tolerance
                      are favorable for application in hot gas sections of
                      aircraft turbines. To improve the strain tolerance of
                      atmospheric plasma sprayed (APS) TBCs, 400 mu m-500 mu m
                      thick coatings with very high segmentation crack densities
                      produced with fused and crushed yttria stabilized zirconia
                      (YSZ) were developed. Using a Triplex II plasma gun and an
                      optimized spraying process, coatings with segmentation crack
                      densities up to 8.9 cracks mm(-1), and porosity values lower
                      than $6\%$ were obtained. The density of branching cracks
                      was quite low which is inevitable for a good inter-lamellar
                      bonding. Thermal cycling tests yielded promising strain
                      tolerance behavior for the manufactured coatings. Samples
                      with high segmentation crack densities revealed promising
                      lifetime in burner rig tests at rather high surface (1350
                      degrees C) and bondcoat temperatures (up to 1085 degrees C),
                      while coatings with lower crack densities had a reduced
                      performance. Microstructural investigations on
                      cross-sections and fracture surfaces showed that the
                      segmentation crack network was stable during thermal shock
                      testing for different crack densities. The main failure
                      mechanism was delamination and horizontal cracking within
                      the TBC near the thermal grown oxide layer (TGOs) and the
                      TBC. (C) 2011 Elsevier B.V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {IEK-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      shelfmark    = {Materials Science, Coatings $\&$ Films / Physics, Applied},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000295308100003},
      doi          = {10.1016/j.surfcoat.2011.06.032},
      url          = {https://juser.fz-juelich.de/record/16594},
}