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@ARTICLE{Niewolak:279596,
      author       = {Niewolak, Leszek and Savenko, Aleksei and Grüner, Daniel
                      and Hattendorf, H. and Breuer, Uwe and Quadakkers, Willem
                      J.},
      title        = {{T}emperature {D}ependence of {L}aves {P}hase {C}omposition
                      in {N}b, {W} and {S}i-{A}lloyed {H}igh {C}hromium {F}erritic
                      {S}teels for {SOFC} {I}nterconnect {A}pplications},
      journal      = {Journal of phase equilibria and diffusion},
      volume       = {36},
      number       = {5},
      issn         = {1547-7037},
      address      = {Boston, Mass.},
      publisher    = {Springer},
      reportid     = {FZJ-2015-07480},
      pages        = {471-484},
      year         = {2015},
      abstract     = {The Laves phase strengthened ferritic steel Crofer 22 H has
                      been proposed as construction material for interconnects in
                      solid oxide fuel cells. The background of the present study
                      relates to the further qualification of this steel,
                      especially with respect to a possible optimization of amount
                      and composition of the strengthening Laves phase
                      precipitates. For this purpose the chemical composition of
                      the Laves phase in a number of high purity model alloys as
                      well as in Crofer 22 H equilibrated at temperatures between
                      700 and 1100 °C was measured by EDX/WDX and atom probe
                      tomography (APT). The obtained chemical compositions were
                      used for a qualitative estimation of the site occupancy for
                      Fe, Cr, Nb, W and Si in the Laves phase unit cell.
                      Additionally, the results from APT measurements indicate the
                      important role of impurities such as e.g. titanium in the
                      Laves phase formation. Finally, the experimental results
                      were compared with Thermocalc calculations using the
                      database TCFE 7. This revealed that within the temperature
                      range 800-900 °C a qualitative description of phases is
                      possible, however, substantial differences existed
                      particularly for the steel Crofer 22 H at and below 700 °C
                      and above 950 °C.},
      cin          = {IEK-2 / ZEA-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {135 - Fuel Cells (POF3-135)},
      pid          = {G:(DE-HGF)POF3-135},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000362910800006},
      doi          = {10.1007/s11669-015-0403-5},
      url          = {https://juser.fz-juelich.de/record/279596},
}