固体氧化物燃料电池用SUS430-Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)不锈钢-陶瓷复合连接体材料的制备及性能研究  

Preparation and performance of SUS430-Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)stainless steelceramic composite interconnect materials for solid oxide fuel cell

作　　者：王飘飘 陈鹏起 方青青 张美 洪涛 程继贵[1,2,3] WANG Piao-piao;CHEN Peng-qi;FANG Qing-qing;ZHANG Mei;HONG Tao;CHENG Ji-gui(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Powder Metallurgy Engineering and Technology Research Center of Anhui Province,Hefei University of Technology,Hefei 230009,China;National–Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009 [2]合肥工业大学安徽省粉末冶金工程技术研究中心,合肥230009 [3]合肥工业大学有色金属与加工技术国家地方联合工程研究中心,合肥230009

出　　处：《粉末冶金技术》2021年第2期99-106,共8页Powder Metallurgy Technology

基　　金：国家自然科学基金资助项目(51802065);中国博士后科学基金资助项目(2018M630702);中央高校基本科研基金资助项目(PA2019GDPK0083)。

摘　　要：以SUS430不锈钢粉末和Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)(SFM)陶瓷粉末为原料,通过成形烧结结合涂覆的方法制备了应用于固体氧化物燃料电池(solid oxide fuel cell,SOFC)的SUS430-SFM不锈钢-陶瓷复合连接体材料,并对SUS430和SUS430-SFM两种烧结体试样的显微组织、抗氧化性能和导电性能进行了分析。结果表明,SFM涂层与SUS430基体具有相匹配的热膨胀系数(thermal expansion coefficient,TEC),两者界面结合良好;在空气气氛中经800℃氧化140 h后,SUS430-SFM试样的氧化速率常数(K)约为3.66×10^(−14)g^(2)∙cm^(−4)∙s^(−1),比SUS430试样(2.42×10^(−14)g^(2)∙cm^(−4)∙s^(−1))降低了约50%,其面比电阻(area specific resistance,ASR)则由SUS430试样的81 mΩ∙cm^(2)降至SUS430-SFM的2.6 mΩ∙cm^(2),说明SFM涂层能够有效改善SUS430不锈钢基体的抗氧化及导电性能。The SUS430-Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)(SUS430-SFM)stainless steel-ceramic composite connector materials for solid oxide fuel cell(SOFC)were prepared by a compaction-sintering-coating method,using SUS430 stainless powders and Sr_(2)Fe_(1.5)Mo_(0.5)O_(6−δ)(SFM)ceramic powders as the raw materials.Microstructure,oxidation resistance,and electrical conductivity of the sintered SUS430 and SUS430-SFM samples were characterized.The results show that the SFM coating and the SUS430 substrate show a matching thermal expansion coefficient(TEC),and there is a good combination between the coating and the substrate.The oxidation rate constant of the SUS430-SFM sample is about 3.66×10^(−14)g^(2)∙cm^(−4)∙s^(−1)after oxidation at 800℃for 140 h in air,which is about 50%lower than that of the SUS430 sample(2.42×10^(−14)g^(2)∙cm^(−4)∙s^(−1)).The area specific resistance(ASR)of the SUS430-SFM sample also reduces from 81 mΩ∙cm^(2)(SUS430 sample)to 2.6 mΩ∙cm^(2).The present work indicates that the SFM coating can effectively improve the oxidation resistance and the electrical conductivity of the SUS430 stainless substrate.

关 键 词：固体氧化物燃料电池 连接体材料 陶瓷 氧化动力学 导电性 

分 类 号：TF125.1[冶金工程—粉末冶金]