溶胶凝胶法制备燃料电池金属双极板抗氧化导电涂层
Preparation of Anti-oxidation Electrical Conductive Coating of Solid Oxide Fuel Cells Interconnector by Sol-gel Process
摘 要
通过溶胶凝胶法在铁铬合金表面制备La1-XCaXCrO3涂层以改善其高温抗氧化性能.采用红外光谱(IR)测定溶胶所含官能团,用差热分析(DTA)、热重法(TG)、X射线衍射法(XRD)分析涂层的相变规律,并用扫描电镜(SEM)等观察涂层结构和对比氧化腐蚀的表面形貌.结果表明,通过溶胶-凝胶法在铁铬合金表面形成的均匀涂层能有效防止氧化行为发生,并具有良好的电导率,是高温下对金属双极板有效的保护方法.
UNS430钢
La1-XCaXCrO3涂层
抗氧化
电导率
solid oxide fuel cells(SOFC)
UNS430 steel
La1-XCaXCrO3 coating
anti-oxidation
electrical conductivity
Abstract
Ca-doped lanthanum chromite coating was synthesized by sol-gel process on the Fe-Cr alloy substrate in order to improve the anti-oxidation ability.Function group of molecule in the sol was speculated on the basis of IR.The phase transformation of the coating was investigated by DTA,TG and XRD.The structure of coating and surface morphology of corrosion were observed by SEM and OM.Results showed that the coating formed on Fe-Cr alloy substrate prevented oxidation efficiently and reached relatively high electrical conductivity.This kind of coating is an effective method to protect the metallic substrate at high temperatures.
中图分类号 TG174.2 TQ133.3
所属栏目 应用技术
基金项目
收稿日期 2007/9/21
修改稿日期 2007/10/10
网络出版日期
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引用该论文: JIANG Yang,JIANG Jian-hua,ZHU Yuan-tai. Preparation of Anti-oxidation Electrical Conductive Coating of Solid Oxide Fuel Cells Interconnector by Sol-gel Process[J]. Corrosion & Protection, 2008, 29(11): 684～687
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参考文献
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【2】Amitava Chakraborty,Basu R N,Maiti H S.Low temperature sintering of La(Ca)CrO3 prepared by an autoignition process[J].Materials Letter,2000,45:162-166.
【3】Atsuko Kajimura,Hirokazu Sasaki,Shoji Otoshi,et al.Preparation of La(Sr)CrO3-δ thin film interconnector by high deposition rate laser ablation method[J].Solid State Lonics,1995,82:107-111.
【4】Christopher Johnson,Randall,Randall Gemmen,et al.Nano-structured self-assembled LaCrO3 thin film deposited by RF-magnetron sputtering on a stainless steel interconnect material[J].Composites,2004,35:167-172.
【5】Zhong Zhimin.Stoichiometric lanthanum chromite based ceramic interconnects with low sintering temperature[J].Solid State Lonics,2006,177:757-764.
【6】V Vashook,L Vasylechko,J Zosel,et al.Lanthanum-calcium chromites-titanates as possible anode materials as SOFC[J].Solid State Lonics,2004,175:151-155.
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