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Conductivity and Oxidation Behavior of Fe-16Cr Alloy as Solid Oxide Fuel Cell Interconnect Under Long-Stability and Thermal Cycles

查看全文 作　　者：Jianwu [1,2]Zhou;Qiangfeng [3]Chen;Junkang [2]Sang;Rongmin [1]Wu;Zhuobin [1]Li;Wanbing [2]Guan 高影响力作者 机构地区：[1]Zhejiang Energy Group,R&D Institute Co.,Ltd,Hangzhou,311121,China;[2]Ningbo Institute of Material Technology&Engineering,Chinese Academy of Sciences,Ningbo,315201,China;[3]Zhejiang Energy Beilun Power Generation Co.Ltd,Ningbo,315800,China高影响力机构 出　　处：《Acta Metallurgica Sinica(English Letters)》索引2021年第34卷第5期,共7页高影响力期刊 基　　金：financially supported by the Key R&D Program from the Ministry of Science and Technology of China(No.2018YFB1502600);the Ningbo Major Special Projects of the Plan“Science and Technology Innovation 2025”(No.2019B10043);the Science and Technology Project of Zhejiang Energy Group Co.,Ltd.(No.znkj-2018-008);the Key Laboratory of Solar Energy Utilization&Energy Saving Technology of Zhejiang Province。 摘　　要：Conductivity and oxidation behavior of Fe-16Cr alloy were investigated under long-term stability operation at 750℃and thermal cycles from room temperature to 750℃.The results showed that the area specific resistance(ASR)of Fe-16Cr alloy increased over time and reached about 56.29 mΩcm~(2)after 40,000 h of long-term stability operation at 750℃by theoretical calculation.The ASR of Fe-16Cr remained about 11 mΩcm~(2)after 52 thermal cycles from room temperature to750℃.The analysis of structure showed that the oxidized phase on the surface of Fe-16Cr was mainly composed of Cr_(2)O_3and Fe Cr_(2)O_(4)spinel phase under long-term stability operation at 750℃.While the Cr_(2)O_(3)phase was mainly observed on the surface of Fe-16Cr alloy after 52 thermal cycles,the oxidation rates of Fe-16Cr alloy were 0.0142μm h~(-1)and 0.06μm cycle~(-1)under long-term stability operation and under thermal cycle,respectively.The property of Fe-16Cr alloy with 2.6 mm thickness met the lifespan requirement of interconnect for solid oxide fuel cell(SOFC)stacks.The Cr element all diff used onto oxidation surface,indicating that it was necessary to spray a coating on the surface to avoid poisoning cell cathode of SOFCs.Two 2-cell stacks were assembled and tested to verify the properties of Fe-16Cr alloy as SOFC interconnect under long-term stability operation and thermal cycle condition. 关 键 词：Fe-16Cr INTERCONNECT Long-term stability Thermal cycle Solid oxide fuel cell
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