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@ARTICLE{Nowak:824686,
      author       = {Nowak, Wojciech and Naumenko, D. and Jalowicka, Aleksandra
                      and Young, D. J. and Nischwitz, V. and Quadakkers, W. J.},
      title        = {{E}ffect of {A}lloy composition on the {O}xidation-induced
                      {B}oron {D}epletion in {C}ast {N}i-base {S}uperalloy
                      {C}omponents},
      journal      = {Materials and corrosion},
      volume       = {68},
      number       = {2},
      issn         = {0947-5117},
      address      = {Weinheim [u.a.]},
      publisher    = {Wiley-VCH},
      reportid     = {FZJ-2016-07244},
      pages        = {171–185},
      year         = {2017},
      abstract     = {The high temperature air oxidation of the two
                      conventionally cast Ni-based superalloys Rene 80 containing
                      92 wt ppm boron and CM 247 containing 110 wt ppm of
                      boron was studied at temperatures between 850 and 1050 °C
                      and times ranging from 1 to 100 h. Analysis by GD-OES and
                      SEM/WDX/EBSD revealed the surface scale on Rene 80 after
                      exposure at 1050 °C to consist of Cr2O3 with TiO2 in the
                      outer part and BCrO3 and CrTi2O5 in the inner part. Internal
                      Al2O3 precipitates were present below the external scale.
                      After 1 h exposure of CM 247 an inner dense alumina scale
                      formed over eutectic alloy regions containing coarse γ′
                      precipitates. Over dendritic regions a Cr-rich oxide scale
                      with BCrO3-precipitates formed initially and aluminum was
                      internally oxidized. After longer oxidation times an alumina
                      sub-scale grew from the internal precipitates, and oxidation
                      of the initially present depleted alloy zones resulted in
                      formation of outer Ni and Co rich oxides. In both alloys,
                      boron depletion in the bulk alloy occurred due to formation
                      of the mentioned boron rich oxide. The extent of depletion
                      was substantially higher for the chromia forming Rene 80
                      than for CM 247. In the latter material the boron depletion
                      was suppressed after the formation of the dense, inner
                      alumina scale.},
      cin          = {IEK-2 / ZEA-3},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-2-20101013 / I:(DE-Juel1)ZEA-3-20090406},
      pnm          = {111 - Efficient and Flexible Power Plants (POF3-111)},
      pid          = {G:(DE-HGF)POF3-111},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000394663600007},
      doi          = {10.1002/maco.201608837},
      url          = {https://juser.fz-juelich.de/record/824686},
}