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  • Wäsche, Rolf (3) (entfernen)

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  • 2019 (1)
  • 2018 (2)

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  • Zeitschriftenartikel (2)
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  • Hot steam (3)
  • Friction (2)
  • Wear (2)
  • Alumina (1)
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Organisationseinheit der BAM

  • 6 Materialschutz und Oberflächentechnik (3)
  • 6.3 Makro-Tribologie und Verschleißschutz (3)
  • 1 Analytische Chemie; Referenzmaterialien (2)
  • 1.4 Prozessanalytik (2)

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Tribology in hot steam for energy recovery (2018)
Woydt, Mathias ; Wäsche, Rolf ; Brandt, Guido ; Ehrke, Roman ; Yano, S. ; Sasaki, S.
The wear rates of self-mated alumina couples show that friction as well as wear is largely determined by the above-mentioned hydro-thermal conditions. The presence of water and its amount available in the surrounding system either in liquid or in gaseous form plays a key role for friction and wear behavior and can be beneficial for the tribological profile of steam degradation resistant materials. Hot steam enhances the tribo-chemical formations of oxides and hydroxides on MgO-ZrO2 alumina and antimony impregnated carbon.
Wear behaviour of alpha-alumina in hot steam at high contact pressure (2018)
Wäsche, Rolf ; Brandt, Guido ; Ehrke, Roman ; Nolze, Gerd ; Schmid, Thomas ; Sasaki, S. ; Woydt, Mathias
The work examines the wear behaviour of α-aluminium oxide by combining thermodynamic modelling with advanced wear testing as well as analytical methods to get a better understanding of this structural ceramic material wear behavior and its possible use in high temperature steam environment.
Wear behaviour of MgO stabilized zirconia in hot steam environment up to 400°C (2019)
Wäsche, Rolf ; Sato, K. ; Brandt, Guido ; Schmid, Thomas ; Sasaki, S. ; Woydt, Mathias
Self-mated magnesia stabilized zirconia (Mg-PSZ) ceramic sliding couples have been investigated at 100 N load (P0max= 1324 MPa) in oscillating sliding conditions in different humidity conditions in air and in hot steam. Temperatures have been varied up to 400 °C and pressures up to 6 bars. The results show that the wear behavior of MgO-ZrO2 under high Hertzian contact pressures is strongly dependent on temperature and is similar for both dry oscillating and oscillating in hot steam. However, although the evolution in wear rates on temperature is similar and the wear rates of MgO-ZrO2 plunged above 300 °C in hot steam and air by nearly three orders of magnitude, SEM micrographs revealed in hot steam at 400 °C smooth wear tracks. In contrast, hot steam enhanced the tribochemistry of self-mated alumina couples and reduced wear rates. Hot steam decreased the coefficients of friction of MgO-ZrO2 with increasing temperature, but not the wear rates.
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