Applying the protective CuMn <ce:inf loc='post'>2</ce:inf>O <ce:inf loc='post'>4</ce:inf> spinel coating on AISI-430 ferritic stainless steel used as solid oxide fuel cell interconnects

Z. Ranjbar-Nouri; M. Soltanieh; S. Rastegari

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Applying the protective CuMn 2O 4 spinel coating on AISI-430 ferritic stainless steel used as solid oxide fuel cell interconnects

机译：应用保护性CUMN 2 O 4 SPINEL涂层在AISI-430铁素体不锈钢上用作固体氧化物燃料电池互连

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Abstract

Ferritic stainless steels at high temperature and long operating time of solid oxide fuel cells (SOFC) face with some problems such as overgrowth and spallation of the surface oxide and cathode poisoning due to chromium evaporation. In the present work in order to improve the above-mentioned problems, the protective/conductive CuMn2O4spinel coating was created on the AISI-430 ferritic stainless steel by means of pulse electrodeposition and subsequent heat treatment. Therefore, at first, the copper was applied to the substrate from a sulfate bath with an average current density of 48mA/cm2and a deposition time of 4min. Subsequently, manganese was electrodeposited on the copper layer from a sulfate bath with an average current density of 125mA/cm2and a deposition time of 8min. The frequency and duty cycle in the pulse electrodeposition of Cu and Mn Were considered100Hz and 80%, respectively. Then, to convert the metallic layers to spinel and also to evaluate its prevention of outward diffusion of Cr, oxidation was carried out at 750°C in the air for 24h and 100h. Microstructural evaluation of samples cross-section by scanning electron microscope (SEM) equipped with EDS indicated that the CuMn2O4spinel layer acted as a barrier to outward diffusion of Cr effectively and the amount of Cr in the coating surface was zero. Also, coating layer had good adhesion to the substrate. By investigation of samples oxidation in the air for 0.5, 10 and 120min at 750°C, the results indicated that Mn was rapidly oxidized t

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抽象

铁素体不锈钢在高温和长时间的固体氧化物燃料电池（SOFC）面对的一些问题由于铬蒸发引起的表面氧化物和阴极中毒的过度生长和剥落。在目前的工作中为了改善上述问题，保护/导电CUMN 2 O 4 通过脉冲电沉积和随后的热处理在AISI-430铁素体不锈钢上产生尖晶石涂层。因此，首先，将铜从硫酸盐浴施加到基材上，平均电流密度为48mA / cm：sup =“post”> 2 和4min的沉积时间。随后，将锰从铜层电沉积在硫酸盐上，平均电流密度为125mA / cm：sup =“post”> 2 和8min的沉积时间。 Cu和Mn的脉冲电沉积中的频率和占空比分别被认为是100Hz和80％。然后，将金属层转化为尖晶石，并且还要评估其预防Cr的向外扩散，氧化在750℃下在空气中进行24小时和100h。通过扫描电子显微镜（SEM）配备EDS的样品横截面的微观结构评估表明CUMN 2 O 4 尖晶石层作为有效地向外扩散的屏障，并且涂层表面中的Cr的量为零。此外，涂层对基材具有良好的粘附性。通过在750℃下调查空气中的样品氧化0.5,10和120min，结果表明Mn迅速氧化

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来源
《Surface & Coatings Technology》 |2018年第2018期|共8页
作者
Z. Ranjbar-Nouri; M. Soltanieh; S. Rastegari;
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作者单位

Center of Excellence for High Strength Alloys Technology (CEHSAT) School of Metallurgy and Materials Engineering Iran University of Science and Technology;

Center of Excellence for High Strength Alloys Technology (CEHSAT) School of Metallurgy and Materials Engineering Iran University of Science and Technology;

Center of Excellence for High Strength Alloys Technology (CEHSAT) School of Metallurgy and Materials Engineering Iran University of Science and Technology;

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原文格式 PDF
正文语种 eng
中图分类金属腐蚀与保护、金属表面处理;
关键词
Solid oxide fuel cell; Interconnect; Coating; Pulse electrodeposition; CuMn2O4spinel;

机译：固体氧化物燃料电池;互连;涂层;脉冲电沉积;CUMN2O4SPINEL;

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Applying the protective CuMn 2O 4 spinel coating on AISI-430 ferritic stainless steel used as solid oxide fuel cell interconnects

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