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LaCrO3-based coatings deposited by high-energy micro-arc alloying process on a ferritic stainless steel interconnect material
Feng, Z. J.; Zeng, C. L.
Corresponding AuthorZeng, C. L.(clzeng@imr.ac.cn)
2010-07-01
Source PublicationJOURNAL OF POWER SOURCES
ISSN0378-7753
Volume195Issue:13Pages:4242-4246
AbstractCurrently 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.
KeywordSolid oxide fuel cells Ferritic metallic interconnect High-energy micro-arc alloying technique Lanthanum chromite Oxidation Contact resistance
Funding OrganizationNational Natural Science Foundation of China
DOI10.1016/j.jpowsour.2010.01.023
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50771101]
WOS Research AreaElectrochemistry ; Energy & Fuels
WOS SubjectElectrochemistry ; Energy & Fuels
WOS IDWOS:000276764600038
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/101680
Collection中国科学院金属研究所
Corresponding AuthorZeng, C. L.
AffiliationChinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
Recommended Citation
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.
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