کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8027554 | 1517624 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
La0.7Sr0.3MnO3 â δ barrier for Cr2O3-forming SOFC interconnect alloy coated by electrostatic spray deposition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, electrostatic spray deposition (ESD) technology was used to deposit dense, free-cracks and thin La0.7Sr0.3MnO3 â δ (LSM) layers on SS446 alloy interconnect to be used in solid oxide fuel cell (SOFC) after subsequent annealing at 800 °C in air for 2 h. The corrosion resistance of uncoated and LSM-coated steels has been studied by electrical and thermogravimetric measurements. The oxidation rate was strongly reduced for LSM-coated steel in ambient air and pure oxygen at 800 °C for 250 h. It was found for the first time that a dense LSM coating as thin as 300 nm efficiently reduces the oxidation rate by limiting outward Cr3 + diffusion. A protective chromia scale was detected by SEM and EDS at the interfacial layer. The area specific resistance (ASR) of LSM-coated SS446 was found very low (30 mΩ·cm2) and stable in comparison with the uncoated one (80 mΩ·cm2) after 200 h oxidation in air at 800 °C. The results of this work demonstrate the possibility of automated production of dense conductive interconnect LSM-coated materials and give a standard thickness to obtain stable long-term operation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 254, 15 September 2014, Pages 157-166
Journal: Surface and Coatings Technology - Volume 254, 15 September 2014, Pages 157-166
نویسندگان
Leandro da Conceição, Laurent Dessemond, Elisabeth Djurado, E.N.S. Muccillo,