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@ARTICLE{Rezanka:845654,
      author       = {Rezanka, Stefan and Somsen, Christoph and Eggeler, Gunther
                      and Mauer, Georg and Vaßen, Robert and Guillon, Olivier},
      title        = {{A} {TEM} {I}nvestigation of {C}olumnar-{S}tructured
                      {T}hermal {B}arrier {C}oatings {D}eposited by {P}lasma
                      {S}pray-{P}hysical {V}apor {D}eposition ({PS}-{PVD})},
      journal      = {Plasma chemistry and plasma processing},
      volume       = {38},
      number       = {4},
      issn         = {1572-8986},
      address      = {Dordrecht},
      publisher    = {Springer Science + Business Media B.V.},
      reportid     = {FZJ-2018-02870},
      pages        = {791-802},
      year         = {2018},
      abstract     = {The plasma spray-physical vapor deposition technique
                      (PS-PVD) is used to deposit various types of ceramic
                      coatings. Due to the low operating pressure and high
                      enthalpy transfer to the feedstock, deposition from the
                      vapor phase is very effective. The particular process
                      conditions allow for the deposition of columnar
                      microstructures when applying thermal barrier coatings
                      (TBCs). These coatings show a high strain tolerance similar
                      to those obtained by electron beam-physical vapor deposition
                      (EB-PVD). But compared to EB-PVD, PS-PVD allows
                      significantly reducing process time and costs. The
                      application-related properties of PS-PVD TBCs have been
                      investigated in earlier work, where the high potential of
                      the process was described and where the good resistance to
                      thermo-mechanical loading conditions was reported. But until
                      now, the elementary mechanisms which govern the material
                      deposition have not been fully understood and it is not
                      clear, how the columnar structure is built up. Shadowing
                      effects and diffusion processes are assumed to contribute to
                      the formation of columnar microstructures in classical PVD
                      processing routes. For such structures, crystallographic
                      textures are characteristic. For PS-PVD, however, no
                      crystallographic textures could initially be found using
                      X-ray diffraction. In this work a more detailed TEM
                      investigations and further XRD measurements of the columnar
                      PS-PVD microstructure were performed. The smallest build
                      units of the columnar TBC structure are referred to as
                      sub-columns. The observed semi-single crystal structure of
                      individual sub-columns was analyzed by means of diffraction
                      experiments. The absence of texture in PS-PVD coatings is
                      confirmed and elementary nucleation and growth mechanisms
                      are discussed.},
      cin          = {IEK-1 / JARA-ENERGY},
      ddc          = {540},
      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)16},
      UT           = {WOS:000433079900010},
      doi          = {10.1007/s11090-018-9898-y},
      url          = {https://juser.fz-juelich.de/record/845654},
}