پديد آورنده :
حسيني نهوجي، نازنين السادات
عنوان :
توسعه ي پوشش هاي اسپينلي Mn-Cu-O بر روي فولادهاي زنگ نزن فريتي به عنوان اتصال دهنده در پيل هاي سوختي اكسيد جامد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي مواد
صفحه شمار :
نه، 138ص.: مصور، جدول، نمودار
استاد راهنما :
فتح الله كريم زاده، محمدحسن عباسي
استاد مشاور :
گيانگ مان، چوي
توصيفگر ها :
فرآيند گليسين - نيترات , رسانايي الكتريكي
تاريخ نمايه سازي :
1394/04/21
استاد داور :
محمدرضا رحيمي پور، محمد ژياني، محمدحسين عنايتي
كد ايرانداك :
ID775 دكتري
چكيده فارسي :
به فارسي و انگليسي
چكيده انگليسي :
146Development of Mn Cu O spinel coatings on ferritic stainless steel interconnects for solid oxide fuel cells N Hosseini a F Karimzadeh a M H Abbasi a G M Choi ba Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iranb Fuel Cell Research Center and Department of Materials Science and Engineering PohangUniversity of Science and Technology Pohang 790 784 Republic of KoreaAbstractThe goal of this study was to investigate the effect of screen printed Cu1 3Mn1 7O4 La2O3composite coating on chromia scale growth and electrical behavior of AISI430 stainless steelinterconnects The coated samples were characterized by X ray diffraction XRD field emissionscanning electron microscopy equipped with energy dispersive spectroscopy FESEM EDS and4 probe area specific resistance ASR tests The results showed that LaCrO3 conductiveperovskite is formed due to the interdiffusion between Cr2O3 and or CrO3 and La2O3 Thepresence of LaCrO3 through the composite coating and Cr2O3 sub scale accompanied by theeffective role of spinel phase acted as a barrier to mitigate the sub scale growth preventingchromium diffusion through the coating and the cathode The LaCrO3 particles within the sub scale provided suitable conductive paths decreasing ASR from 19 3 m cm2 for spinel coatedsample to 15 m cm2 for composite coated sample at the end of 500 h oxidation at 750 C Keywords Coating Composite Ferritic stainless steel Interconnect Solid oxide fuel cell Spinel 1 IntroductionRecently using thinner electrolyte layers have made it possible to reduce the operatingtemperature of SOFCs stacks from 950 1000 C to 600 850 C This improvement has caused theconventional LaCrO3 based ceramic interconnects to be replaced by high temperature metallicalloys which present higher electronic and thermal conductivity 1 2 The chromia formingferritic stainless steels such as 430 alloy are considered as the most promising candidates asinterconnect 3 4 due to their thermal expansion coefficient matched to the ceramic parts ofSOFC high oxidation resistance 3 5 However the oxide scale during long life time of SOFCs 40 000h at high temperatures increases the electrical resistance of the stacks and Cr poisoningof the cathode both of which lead to rapid degradation of cell performance 6 Therefore theresearch works are focused on developing conductive ceramic coatings for the metallicinterconnects In this respect spinel coatings can effectively retard oxidation and chromiumvolatility from the ferritic stainless steels 7 In this study a thermally grown Cu1 3Mn1 7O4 spinel layer on AISI 430 ferritic stainless steel hasbeen developed to suppress chromium diffusion and minimize interfacial resistance for themetallic interconnect Also Cu1 3Mn1 7O4 La2O3 composite coating was developed to investigate
استاد راهنما :
فتح الله كريم زاده، محمدحسن عباسي
استاد مشاور :
گيانگ مان، چوي
استاد داور :
محمدرضا رحيمي پور، محمد ژياني، محمدحسين عنايتي
