Effect of CeO2 on oxidation and electrical behaviors of ferritic stainless steel interconnects with Ni-Fe coatings
Effect of CeO2 on oxidation and electrical behaviors of ferritic stainless steel interconnects with Ni-Fe coatings
复制标题
CeO2 对 Ni-Fe 涂层铁素体不锈钢互连体氧化和电学行为的影响
DOI：
10.1016/j.ijhydene.2018.02.178
复制
发表时间：
2018
影响因子：
7.2
通讯作者：
Zeng Chao Liu
中科院分区：
文献类型：
--
作者：
You Peng Fei;Zhang Xue;Zhang Hai Liang;Liu Hui Jun;Zeng Chao Liu
铁素体不锈钢是固体氧化物燃料电池（SOFC）连接件的理想材料。铁素体不锈钢作为互连线目前亟待解决的问题是其电阻的迅速增加和氧化铬蒸发引起的阴极中毒。在430不锈钢表面电沉积Ni-Fe和Ni-Fe-CeO_2合金镀层。在800 ° C的空气中氧化过程中，涂层样品上热生长了外层致密的NiFe2O4层和内层保护性的Cr2O3层。NiFe_2O_4层有效地阻止了Cr的向外迁移。CeO2的加入降低了Cr2O3的生长速率，减少了氧化膜/合金界面附近的气孔数量。此外，通过添加CeO2实现了更高的电导率。
Ferritic stainless steels are promising materials for application in interconnects of solid oxide fuel cells (SOFC). The present problems to be solved urgently for using ferritic stainless steels as interconnects are their rapid increase in electrical resistance and the cathode poisoning caused by evaporation of chromia. In the present study, the Nisingle bondFe and NiFesingle bondCeO2alloy coatings have been electro-deposited onto 430 stainless steels (430SS). During oxidation at 800 °C in air, an outer dense NiFe2O4layer and an inner protective Cr2O3layer have thermally grown on the coated samples. The NiFe2O4layer retards the outward migration of chromium effectively. The addition of CeO2reduces the growth rate of Cr2O3and decreases the number of pores near the oxide scale/alloy interface. Moreover, a higher electrical conductivity has been achieved by the addition of CeO2.