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IMPROVED PLASMA SPRAY PROCESS FOR ELECTROLYTE AND INTERCONNECT COATINGS ON SOLID OXIDE FUEL CELL CATHODE TUBES
IMPROVED PLASMA SPRAY PROCESS FOR ELECTROLYTE AND INTERCONNECT COATINGS ON SOLID OXIDE FUEL CELL CATHODE TUBES
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机译：改进的等离子喷涂工艺，用于固体氧化物燃料电池阴极管上的电解质和互连涂层
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摘要
It was analyzed that the breaking of LSM tubes was due to the high preheating temperature, which was used before plasma spraying. Preheating the tubes externally gradually helped in avoiding the breaking or cracking of LSM tubes. A procedure was evolved to preheat the sample slowly by plasma flame so that even larger samples can be preheated within a short span of time. Apart from the heating procedure, the mandrel also plays an important role. Also, the presence of a highly heat absorbing cushioning layer in between the mandrel and the tube was essential to solve the problem of tube breaking. The gradual cooling of the substrate using plasma flame after coating the electrolyte/interconnect was also found to be crucial in avoiding the cracking/breaking. The electrolyte and interconnect powders used in the fabrication of solid oxide fuel cells were successfully plasma sprayed on the LSM tubes without any breaking or cracking of tubes.
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