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@ARTICLE{Pillai:279587,
      author       = {Pillai, Rishi and Sloof, W. G. and Chyrkin, Anton and
                      Singheiser, Lorenz and Quadakkers, Willem J.},
      title        = {{A} {N}ew {C}omputational {A}pproach for {M}odelling the
                      {M}icrostructural {E}volution and {R}esidual {L}ifetime
                      {A}ssessment of {MC}r{A}l{Y} {C}oatings},
      journal      = {Materials at high temperatures},
      volume       = {32},
      issn         = {0960-3409},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-07471},
      pages        = {57-67},
      year         = {2015},
      abstract     = {MCrAlY (M = Ni, Co) coatings are commonly used to
                      protect the underlying superalloy component in industrial
                      gas turbines and aeroengines from oxidation attack. They
                      also function as bond coats for thermal barrier coatings
                      (TBC). The chemical life time of the coated component is
                      mainly governed by the depletion of the β-phase in the bond
                      coat as a result of simultaneously occurring surface
                      oxidation and interdiffusion between the coating and the
                      substrate. A new computational approach to model the
                      microstructural evolution in MCrAlY (M = Ni, Co)
                      coatings on Ni base superalloys was undertaken in the
                      present study. Scanning electron microscopy (SEM), energy
                      dispersive X-ray spectroscopy (EDX) and wavelength
                      dispersive X-ray spectroscopy (WDX) was employed to
                      characterise MCrAlY coated superalloy samples after exposure
                      at 1000 and 1100°C. Phases were identified by electron
                      backscatter diffraction (EBSD) and correlated with
                      SEM/EDX/WDX analyses.Modelling of the microstructural
                      evolution was carried out considering simultaneously
                      occurring surface oxidation and interdiffusion processes. A
                      flux based calculation of the concentration profiles and
                      stable phases was performed, taking into account diffusion
                      of all elements in the γ, γ' and β-NiAl phases. Good
                      agreement was found between the observed and computed phase
                      distributions after specific time intervals. The computed
                      widths of the β-depletion zones showed satisfactory
                      agreement with the measurements. Additionally, the model was
                      able to predict the formation of a TCP-phase and its
                      penetration into the substrate with increasing exposure time
                      in one of the investigated coating systems.},
      cin          = {IEK-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {111 - Efficient and Flexible Power Plants (POF3-111)},
      pid          = {G:(DE-HGF)POF3-111},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000348713300010},
      doi          = {10.1179/0960340914Z.00000000063},
      url          = {https://juser.fz-juelich.de/record/279587},
}