In the planar Siemens design of the solid oxide fuel cell a metallic bipolar plate is used to separate the single cells. A disadvantage of this chromium based bipolar plate is the formation of highly volatile Cr oxides at the surface of the cathode side leading to a rapid cell degradation. The deposition of a dense perovskite-type oxide layer by vacuum plasma spraying (VPS) avoids the evaporation of chromium oxides. The development of the production process for the deposition of these perovskite-type layers will be described.
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R. Ruckdäschel (1997) studied this question.