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@PHDTHESIS{Fischer:5438,
      author       = {Fischer, Sarah Christine},
      title        = {{K}orrosion von {PCA} durch {M}etalljodidschmelzen sowie
                      deren {B}enetzungseigenschaften},
      volume       = {44},
      issn         = {1866-1793},
      school       = {RWTH Aachen},
      type         = {Dr. (Univ.)},
      address      = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-5438},
      isbn         = {978-3-89336-584-5},
      series       = {Schriften des Forschungszentrums Jülich : Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {148 S.},
      year         = {2009},
      note         = {Record converted from VDB: 12.11.2012; RWTH Aachen, Diss.,
                      2009},
      abstract     = {On high-energy discharge lamps with burners consisting of
                      polycrystalline aluminum oxide (PCA) corrosion leads to
                      relocation of the wall material; the extent of the
                      phenomenon depends on the composition and the wetting
                      behaviour of the liquid salt mixture contained in the lamp.
                      The aim of this work was to better comprehend these
                      phenomena. For this the wetting behaviours of several
                      iodides on PCA- and carbon plates in a water-free argon
                      atmosphere was determined in a contact angle measurement
                      apparatus. While pure salts show good or, at high
                      temperatures, complete wetting, the surface wetting of
                      binary salt mixtures is positively worse, even if only small
                      amounts of the second component are present. From the
                      contact angle measurements the surface tension of the pure
                      salts could be determined. By combining the
                      YOUNG-LAPLACE-Equation with the BUTLER-Equation, the excess
                      GIBBS energy could be related to the contact angles of salt
                      mixtures, which makes the estimation of their wetting
                      properties possible. The extent of the corrosion was
                      determined by annealing experiments in a temperature
                      gradient. No corrosion was found in reference experiments
                      without any salt. In addition to diverse corrosion phenomena
                      the formation of cerium aluminate was observed in some
                      cases. All these effects could also be reproduced by
                      computer simulations, for which a special program was
                      developed. This program may lead to the development of
                      advanced software in the future which can calculate the
                      shape and corrosivity of lamp-relevant salt melts.},
      cin          = {IEF-2},
      cid          = {I:(DE-Juel1)VDB810},
      pnm          = {Rationelle Energieumwandlung},
      pid          = {G:(DE-Juel1)FUEK402},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/5438},
}