Effect of nanostructure Fe-Ni-Co spinel oxides/Y_2O_3 coatings on the high-temperature oxidation behavior of Crofer 22 APU stainless steel interconnect

摘要

To improve the performance of solid oxide fuel cell (SOFC) interconnects, coatings on Crofer 22APU alloy were obtained by the combination of Fe-Ni-Co spinel oxides/Y2O3 and sol-gel method. The cyclic oxidation of steels was carried out at 800 degrees C for 500 h, evaluating the samples' electrical conductivity in the air at 800 degrees C after 500 h of oxidation. Findings indicated that the Fe-Ni-Co spinel oxides/Y2O3 coating could be a barrier to improving the steel oxidation resistance. The surface scale's electrical conductivity on the coated steel was much higher than that on the bare steel.