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@PHDTHESIS{Bhm:279666,
      author       = {Böhm, Anna},
      title        = {{T}hermoschockverhalten und temperaturabhängige
                      {E}igenschaften kohlenstoffarmer und -freier
                      {F}euerfestwerkstoffe},
      volume       = {317},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2015-07548},
      isbn         = {978-3-95806-139-2},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VI, 153 S.},
      year         = {2016},
      note         = {RWTH Aachen, Diss., 2015},
      abstract     = {Novel developed refractories with reduced carbon content
                      for application in steel industry were investigated
                      regarding to their thermo-mechanical behaviour. Another
                      major part of this work was focused on the development and
                      trial of new/optimization of established test methods
                      (thermal shock by heating via electron beam and wedge
                      splitting test). Al$_{2}$O$_{3}$ with the addition of 2.5
                      wt.\% ZrO$_{2}$ and TiO$_{2}$ respectively (AZT) leads to
                      animproved thermal shock behaviour compared to pure
                      Al$_{2}$O$_{3}$ materials. Temperature dependent
                      investigations revealed a thermal hysteresis of elastic
                      modulus, shear modulus, Poisson's ratio and thermal
                      expansion, accompanied by a phase transformation of
                      ZrO$_{2}$ (monoclinic $\rightarrow$ tetragonal). High
                      temperature (800 - 1000 $^{\circ}$C) wedge splitting tests
                      were performed with optical notch opening determination for
                      Al$_{2}$O$_{3}$ and AZT. The phase transformation of
                      ZrO$_{2}$ leads to a more brittle behaviour of AZT at 800
                      $^{\circ}$C compared to room temperature. Different loading
                      configurations for the wedge splitting test were tested
                      using Alumina and Al$_{2}$O$_{3}$-C materials in order to
                      apply the test method on small specimen geometries (40 X 40
                      X 20 mm$^{3}$). Promising results were obtained from a
                      simple approach using two rollers into a grooved sample.
                      With this method, it was possible to determine a constant
                      (sample material independent) friction coefficent ($\mu$ =
                      0,13). The results showed a good agreement with experimental
                      data obtained from compact tension tests. Thermal shock
                      tests by heating using the electron beam facility JUDITH 1
                      allowed the application of a well distributed loading
                      pattern on MgO-C Materials. Temperatures up to 1400
                      $^{\circ}$C at the surface were achieved. The main damage
                      was observed within the MgO grains.},
      cin          = {IEK-2},
      cid          = {I:(DE-Juel1)IEK-2-20101013},
      pnm          = {111 - Efficient and Flexible Power Plants (POF3-111) /
                      HITEC - Helmholtz Interdisciplinary Doctoral Training in
                      Energy and Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-111 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/279666},
}