| SOFC 분리판용 Fe-Cr 합금의 특성에 미치는 합금성분의 영향 |
| 김도형, 전재호, 김승구, 전중환 |
| 포항산업과학연구원 부품신소재연구센타 |
| Effects of Alloying Elements on the Properties of Fe-Cr Alloys for SOFC Interconnects |
| Do-Hyeong Kim, Jae-Ho Jun, Seung-Goo Kim, Joong-Hwan Jun |
| New Materials and Components Research Center, RIST |
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| ABSTRACT |
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The oxidation resistance and electrical conductivity of various commercial ferritic stainless steels including STS444 were tested in an air atmosphere at $700^{circ}C$. Crofer22 developed specially for SOFC interconnect was also examined for the aim of comparing with the test results of STS444. Although STS444 exhibited higher oxidation resistance than Corfer22, the electrical conductivity of the scale formed on Crofer22 was higher, indicating that the resistivity of scale formed on Crofer22 is much lower than that of STS444. To gain a better understanding of the relation between oxidation behavior and electrical conductivity, the oxide scales formed on STS444 and Crofer22 were analyzed in terms of the structure, composition, and phase. Consequently, the influence of alloying elements on electrical conductivity of Fe-Cr alloys was discussed. |
| Key words:
SOFC, Interconnect, Fe-Cr alloy, Oxidation resistance, Area specific resistance |
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