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@PHDTHESIS{Kraus:32882,
      author       = {Kraus, Christina and Quadakkers, Willem J.},
      title        = {{K}orrosionsverhalten metallischer und keramischer
                      {W}erkstoffe in {P}rozessgasen zur {H}erstellung von
                      {S}olarsilizium},
      volume       = {4025},
      issn         = {0944-2952},
      school       = {Techn. Hochsch. Aachen},
      type         = {Dr. (FH)},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-32882, Juel-4025},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {III, 157 p.},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012; Aachen, Techn.
                      Hochsch., Diss., 2003},
      abstract     = {The increasing emission of CO$_{2}$, due to the growing
                      Power consumption, requires more and more efforts to replace
                      fossile fuels by sophisticated no-emission systems in Power
                      generation. Using photovoltaics is one possible option.
                      Producing electricity by solar energy, photovoltaics may
                      contribute to a significant reduction of CO$_{2}$ emissions.
                      The basic material in photovoltaics is solar grade silicon.
                      lt is the price of this material, which is one of the major
                      obstacles, when thinking of a commercial use of solar
                      energy. Most efficient cost reduction is expected by
                      improving the refining process of metallurgical grade
                      silicon. The hydrochlorination, i.e. the synthesis of
                      Trichlorsilane (SiHCl$_{3}$), is the first step of the
                      refining process. Hydrochlorination requires a special
                      material for the high-Pressure fluidized bed reactor and
                      other components of the installation, able to resist the
                      corrosioe nature of the process gases. Some Fe and Ni base
                      alloys, metals and ceramics as well, have been studied in
                      order to find suitable materials for the reactor and to
                      gather basic knowledge of the corrosion mechanisms. The
                      obtained results prove that under conditiones of the
                      syntheses of Trichlorsilane the reaction of silicon with the
                      base metal initially produces a silicide film. However, with
                      increasing temperatures up to 700°C and Pressure up to 30
                      bar the increased partial pressure of chlorine leads to a
                      formation of volatile metal chlorides. Consequently the
                      porosity of the silicide scale increases and scale
                      spallation occurs especially at the iron base alloys
                      indicating high corrosion rates. The best resistance in
                      chlorinizing and silicizing atmospheres were found for
                      commercial Ni base alloys and temary model alloys with a
                      molybdenum and chromium compound such as MITSUBISHI alloy
                      T21 and HASTELLOY alloy C-276, i.e. alloys similar to
                      Ni25Cr20Mo. This work presents fundamental corrosion data
                      which might be useful for the design of future
                      hydrochlorination reactors. Corrosion mechanisms, as a
                      function of temperature (600°C - 700°C) and pressure (1
                      bar and 30 bar resp.), in chlorinizing and silicizing
                      environment will be explained.},
      cin          = {IWV-2},
      cid          = {I:(DE-Juel1)VDB2},
      pnm          = {Werkstoffsysteme für Kraftwerke},
      pid          = {G:(DE-Juel1)FUEK248},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/32882},
}