Electrochemical blackening of yttria-stabilized zirconia : morphological instability of the moving reaction front
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Date
1999Author
Janek, Jürgen
Korte, Carsten
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http://dx.doi.org/10.22029/jlupub-16099Abstract
Electrochemical reduction was performed on both polycrystals of calcia-stabilized zirconia (CSY) and single crystals of yttria-stabilized zirconia (YSZ) at 500°C. A glass-encapsulation was used to prevent access of molecular oxygen from the gas phase and to realize a virtually two-dimensional geometry for the reacting crystal. The resulting ... blackening process which occurs by the advancement of a morphologically unstable reaction front was observed in-situ in a heating-stage by the use of an optical microscope.