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@ARTICLE{Mauer:858377,
      author       = {Mauer, Georg},
      title        = {{N}umerical {S}tudy on {P}article–{G}as {I}nteraction
                      {C}lose to the {S}ubstrates in {T}hermal {S}pray {P}rocesses
                      with {H}igh-{K}inetic and {L}ow-{P}ressure {C}onditions},
      journal      = {Journal of thermal spray technology},
      volume       = {28},
      number       = {1-2},
      issn         = {1544-1016},
      address      = {Boston, Mass.},
      publisher    = {Springer},
      reportid     = {FZJ-2018-07263},
      pages        = {27-39},
      year         = {2019},
      abstract     = {In thermal spray processes, the interaction between the gas
                      jet and the particulate feedstock can affect the coating
                      build-up mechanisms considerably. In particular under
                      high-kinetic and low-pressure conditions, small particles
                      are subjected to rapid deflection and velocity changes close
                      to the substrate. In this work, numerical studies were
                      carried out to investigate the interaction between gas and
                      particles in the substrate boundary layers (BL). Typical
                      conditions for suspension plasma spraying (SPS), plasma
                      spray-physical vapor deposition (PS-PVD), and aerosol
                      deposition (AD) were taken as a basis. Particular importance
                      was attached to the consideration of rarefaction and
                      compressibility effects on the drag force. Typical Stokes
                      numbers for the different thermal spray processes were
                      calculated and compared. Possible effects on the resulting
                      coating build-up mechanisms and microstructure formation are
                      discussed. The results show that just for larger particles
                      in the SPS process the laminar flow attached to the
                      particles begins to separate so that the drag coefficients
                      have to be corrected. Furthermore, slip effects occur in all
                      the investigated processes and must be considered. The
                      comparison of calculated Stokes numbers with critical values
                      shows that there is a disposition to form columnar
                      microstructures or stacking effects depending on the
                      particle size for PS-PVD and SPS, but not for AD.},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {113 - Methods and Concepts for Material Development
                      (POF3-113)},
      pid          = {G:(DE-HGF)POF3-113},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000456599500004},
      doi          = {10.1007/s11666-018-0810-3},
      url          = {https://juser.fz-juelich.de/record/858377},
}