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  In-situ Observation of Co-Ce Coated Metallic Interconnect Oxidation Combined with High-Resolution Post Exposure Analysis

Poitel, S., Wang, Z.-J., Willinger, M. G., Van herle, J., & Hébert, C. (2017). In-situ Observation of Co-Ce Coated Metallic Interconnect Oxidation Combined with High-Resolution Post Exposure Analysis. ECS Transactions, 78(1), 1615-1632. doi:10.1149/07801.1615ecst.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-FCA7-9 Version Permalink: https://hdl.handle.net/21.11116/0000-0004-6E42-7
Genre: Journal Article

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 Creators:
Poitel, Stéphane1, 2, Author
Wang, Zhu-Jun3, Author           
Willinger, Marc Georg3, 4, Author           
Van herle, Jan2, Author
Hébert, Cécile1, 5, Author
Affiliations:
1Centre Interdisciplinaire de Microscopie Electronique (CIME) Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland, ou_persistent22              
2Group of Energy Materials (GEM), Faculty of Engineering Sciences (STI) STI-SCI-JVH, Ecole Polytechnique Fédérale de Lausanne, CH-1951 Sion, Switzerland, ou_persistent22              
3Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
4Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces Research Campus Golm, D - 14476 Potsdam, Germany, ou_persistent22              
5Laboratoire de spectrométrie et microscopie électronique, Institute of Physics Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland, ou_persistent22              

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 Abstract: Oxidation of Sanergy SSHT steel with Ce-Co coating, used as interconnect material, was observed in-situ in a modified environmental scanning electron microscope (ESEM) at nominal temperature between 800°C and 900°C under 33Pa of oxygen, for different durations (up to 60h). After these in-situ observations, lamellas of the observed target areas were prepared using a focused
ion beam (FIB). This allowed the evaluation in the cross section of the final composition of the oxidation layers of the steel by
scanning transmission electron microscopy (STEM) and energy dispersive x-ray analysis (EDX), of the same zone observed directly on the surface by ESEM. Results show the diffusion of manganese and iron towards the cobalt coating. Underneath, chromia scale forms. Under the applied conditions, the very thin cerium layer does not prevent the diffusion of other elements from the steel. Niobium (with silicium) and titanium form oxidized precipitates in the steel just below the chromia scale.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Published online
 Pages: 18
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1149/07801.1615ecst
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Title: ECS Transactions
Source Genre: Journal
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Publ. Info: Pennington, NJ : The Electrochemical Society
Pages: 18 Volume / Issue: 78 (1) Sequence Number: - Start / End Page: 1615 - 1632 Identifier: ISSN: 1938-5862
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000281280