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http://dx.doi.org/10.3795/KSME-B.2006.30.12.1211

Improvement of Oxidation-resisting Characteristic for SOFC Interconnect Material by Use of Thin Film Coating  

Lee, Chang-Bo (한국과학기술원 기계공학과)
Bae, Joong-Myeon (한국과학기술원 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.12, 2006 , pp. 1211-1217 More about this Journal
Abstract
This study is focused on oxidation prevention of STS430, which is generally used as solid oxide fuel cell(SOFC) interconnect at intermediate operating temperatures with oxidation-proof coatings. Inconel, $La_{0.6}Sr_{0.4}CoO_3(LSCo)$ and $La_{0.6}Sr_{0.4}CoO_3(LSCr)$ were chosen as coating materials. Using a radio frequency magnetron sputtering method, each target material was deposited as thin film on STS430 and was analyzed to find out favorable conditions. In this study, LSCr-coated STS430 can reduce electrical resistance to 1/3 level, compared with uncoated STS430. Also, long-term durability test at $700^{\circ}C$ for 1000 hours tells that LSCr thin layer performs an important role to prohibit serious degradations. Superior oxidation-resistant characteristic of LSCr-coated STS430 is attributed to the inhibition of spinel structure formation such as $MnCr_2O_4$.
Keywords
Solid Oxide Fuel Cell; Interconnect; Oxidation; Thin Film Coating; Area Specific Resistance;
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