LaCrO3-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material

doi:10.1016/j.jpowsour.2010.01.023

IMR OpenIR

	LaCrO3-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material
	Feng, Z. J.; Zeng, C. L.
通讯作者	Zeng, C. L.(clzeng@imr.ac.cn)
	2010-07-01
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 LaCrO3-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 LaCrO3-based coating using an electrode rod of LaCrO3-20 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 LaCrO3-based coatings showed a three-layered microstructure with a NiFe2O4 outer layer, a thick LaCrO3 sub-layer and a thin Cr2O3-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.
关键词	Solid oxide fuel cells Ferritic metallic interconnect High-energy micro-arc alloying technique Lanthanum chromite Oxidation Contact resistance
资助者	National Natural Science Foundation of China
DOI	10.1016/j.jpowsour.2010.01.023
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50771101]
WOS研究方向	Electrochemistry ; Energy & Fuels
WOS类目	Electrochemistry ; Energy & Fuels
WOS记录号	WOS:000276764600038
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/101680
专题	中国科学院金属研究所
通讯作者	Zeng, C. L.
作者单位	Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Feng, Z. J.,Zeng, C. L.. LaCrO3-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	Feng, Z. J.,&Zeng, C. L..(2010).LaCrO3-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	Feng, Z. J.,et al."LaCrO3-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.