| Summary: | 碩士 === 國立中央大學 === 能源工程研究所 === 101 === In recent years, solid oxide fuel cell working temperature was down to 600℃ to 800℃, thus ferritic stainless steel was used as interconnect in Solid Oxide Fuel Cell (SOFC). The functions of interconnect are electrical conduction and separated air and fuel in cathode and anode, respectively. However, long term in SOFC operating atmosphere, the oxidation and Cr poisoning are nonetheless formidable to cause the failure of interconnects.
The protective layer coating on the materials surface was effective way to barrier Cr outward diffusion and excess oxide layer formed on the surface of interconnect materials. In this study, La0.67Sr0.33MnO3 (LSMO) perovskite structure was choosing as protective layer to coating on SS441 surface by aerosol deposition method and screen printing, respectively. SEM results show that high density and uniform thickness LSMO protective layer was success coated on SS441 surface by aerosol deposition method. After 750 hours oxidation at 800℃, the ASR, oxidation resistance and Cr evaporation of coating materials by aerosol deposition method was better than coated by screen printing.
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