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@ARTICLE{Rheinheimer:887827,
      author       = {Rheinheimer, Wolfgang and Schoof, Ephraim and Selzer,
                      Michael and Nestler, Britta and Hoffmann, Michael J.},
      title        = {{N}on-{A}rrhenius grain growth in strontium titanate:
                      {Q}uantification of bimodal grain growth},
      journal      = {Acta materialia},
      volume       = {174},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-04453},
      pages        = {105 - 115},
      year         = {2019},
      abstract     = {Strontium titanate is well-known for its non-Arrhenius
                      grain growth, where grain growth coefficients decrease by
                      orders of magnitude between 1350 °C and 1425 °C. This
                      transition is assumed to be caused by the existence and
                      coexistence of two grain boundary types and results in the
                      formation of bimodal microstructures. So far, no quantified
                      data on the transition behavior was available. The present
                      study uses a comparison of experimental microstructures for
                      various heating times and temperatures with simulated
                      microstructures from phase-field simulations considering
                      various fractions of fast-growing grains. The
                      microstructures are compared by means of their grain size
                      distributions. It is found that the fraction of fast-growing
                      grains follows an anti-Arrhenius behavior. Evaluating the
                      present findings with respective literature data, the grain
                      growth transition could be related to a space charge
                      transition where the fast and slow grain boundaries are
                      associated with strong and weak space charge and
                      segregation. Overall, the present study sheds light on
                      general grain growth transitions observed in several
                      perovskite ceramics.},
      cin          = {IEK-1},
      ddc          = {670},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000474501300010},
      doi          = {10.1016/j.actamat.2019.05.040},
      url          = {https://juser.fz-juelich.de/record/887827},
}