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1512 |
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Effects of silver addition on mechanical and electrical properties of plasma sprayed SOFC interconnect layer |
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Soodong Park / Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, Korea K. S. Kumar / Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-ku, Korea Sangchul Lee/ Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-ku, Korea Changhee Lee/ Kinetic Spray Coating Laboratory (NRL), Division of Materials Science & Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-ku, Korea |
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In this study, interconnect layer in solid oxide fuel cell (SOFC) was built up using two different feedstock powders, i.e., spray-dried La0.6Sr0.4Co0.2Fe0.8O3-รค (LSCF) and blended LSCF/Ag, respectively. Microstructure and phase of each coating was analyzed through scanning electron microscopy (SEM) and X-ray diffraction (XRD) respectively. Furthermore, bond strength, micro-hardness and electrical resistance were measured and compared. The coatings prepared by spray-dried LSCF have higher porosity and cracks at inter-particle boundaries. However, the coatings with silver addition presented reduced cracks and porosity due to relatively high ductility of silver, resulting in higher mechanical and electrical properties. Keywords: Solid oxide fuel cell, Interconnect, LSCF, Silver, APS, Mechanical property, Electrical property. |