LaCrO(3)-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material

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	LaCrO(3)-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material
	Z. J. Feng; C. L. Zeng
	2010
发表期刊	Journal of Power Sources
ISSN	0378-7753
卷号	195 期号:13 页码:4242-4246
摘要	Currently used ferritic stainless steel interconnects are unsuitable for practical applications in solid oxide fuel cells operated at intermediate temperatures due to chromium volatility, poisoning of the cathode material, rapidly decreasing electrical conductivity and a low oxidation resistance. To overcome these problems, a novel, simple and cost-effective high-energy micro-arc alloying (HEMAA) process is proposed to prepare LaCrO(3)-based coatings for the type 430 stainless steel interconnects. However, it is much difficult to deposit an oxide coating by HEMAA than a metallic coating due to the high brittleness of oxide electrodes for deposition. Therefore, a Cr-alloying layer is firstly obtained on the alloy surface by HEMAA using a Cr electrode rod, followed by a LaCrO(3)-based coating using an electrode rod of LaCrO(3)-20 wt.%Ni, with a metallurgical bonding between the coating and the substrate. The preliminary oxidation tests at 850 degrees C in air indicate that the LaCrO(3)-based coatings showed a three-layered microstructure with a NiFe(2)O(4) outer layer, a thick LaCrO(3) sub-layer and a thin Cr(2)O(3)-rich inner layer, which thereby possesses an excellent protectiveness to the substrate alloy and a low electrical contact resistance. (C) 2010 Elsevier B.V. All rights reserved.
部门归属	[feng, z. j.; zeng, c. l.] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;zeng, cl (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;clzeng@imr.ac.cn
关键词	Solid Oxide Fuel Cells Ferritic Metallic Interconnect High-energy Micro-arc Alloying Technique Lanthanum Chromite Oxidation Contact Resistance Oxide Fuel-cells Composite Coatings Oxidation Chromia Cathode
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31108
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. J. Feng,C. L. Zeng. LaCrO(3)-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material[J]. Journal of Power Sources,2010,195(13):4242-4246.
APA	Z. J. Feng,&C. L. Zeng.(2010).LaCrO(3)-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material.Journal of Power Sources,195(13),4242-4246.
MLA	Z. J. Feng,et al."LaCrO(3)-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material".Journal of Power Sources 195.13(2010):4242-4246.