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1 Materials Science Poland

1 2012

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Structural features and gas tightness of EB-PVD 1Ce10ScSZ electrolyte films

Andrzejczuk M., Vasylyev O., Brychevskyi M., Dubykivskyi L., Smirnova A., Lewandowska M., Kurzydłowski K. J., Steiberger-Wilckens R., Mertens J., Haanappel V.

Materials Science Poland

2012

Vol. 30, No. 3

170--179

The structure of Ceria doped Scandia Stabilized Zirconia (1Ce10ScSZ) electrolyte film deposited by EB-PVD (Electron Beam-Physical Vapour Deposition) technique on NiO-ZrO2 substrate was characterized by electron microscopy. The highly porous substrate was densely covered by deposited film without any spallation. The produced electrolyte layer was of a columnar structure with bushes, bundles of a diameter up to 30 ?m and diverse height. Between the columns, delamination cracks of few microns length were visible. The annealing of zirconia film at 1000 °C resulted in its densification. The columnar grains and delaminating cracks changed their shape into a bit rounded. High magnification studies revealed nanopores 5-60 nm formed along the boundaries of the columnar grains during annealing. High-quality contacts between the electrolyte film and anode substrate ensured good conductivity of the electrolyte film and high efficiency of SOFC.