Abstract

The effect of molybdenum addition to Fe-22Cr-0.5Mn ferritic stainless steel on the oxidation, electric property and Cr evaporation was investigated for applications to the solid oxide fuel cell interconnect. Mass gain was measured at 800oC to evaluate the oxidation rate and a 4-probe DC method was used to measure the area specific resistance. Cr and Mo evaporation rate was evaluated by the condensation method. Addition of 0.1 - 4 wt% Mo improved oxidation resistance and electric conductivity. The result suggests that Mo is doped into Cr2O3 layer and changes the defect structure of the layer. The evaporation rate of Cr vapor species was not changed significantly by Mo addition.

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