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Metallic thin-film Co- and Ce/Co-coated steels as interconnect material in IT-SOFC

Hannes Falk Windisch (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Jan-Erik Svensson (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Jan Froitzheim (Institutionen för kemi och kemiteknik, Oorganisk miljökemi)
ECS Transactions. 15th International Symposium on Solid Oxide Fuel Cells, SOFC 2017, Hollywood, United States, 23-28 July 2017 (1938-5862). Vol. 78 (2017), 1, p. 1607-1614.
[Konferensbidrag, refereegranskat]

Cr vaporization, oxide scale growth, and the electrical scale resistance (ASR) were studied at 650°C on coated interconnects intended for IT-SOFC applications. The custom-made SOFC interconnect steel Sanergy HT was coated with thin-film Co- and Ce/Co-coatings and compared to the less expensive substrate steel AISI 441 which was coated with Ce/Co and a 15-20 μm thick commercial MCO-coating. All coated materials mitigated Cr vaporization, and due to the very thin chromia scales formed at the low exposure temperature, ASR values below 10 mΩcm 2 were measured for all materials after 500 h at 650°C. The results in this study show that thin-film metallic Co- and Ce/Co-coated steels show excellent properties as interconnect materials for IT-SOFCs. Thick MCO-coatings can also be used at low temperatures; however, the coating method might be a critical issue for lowtemperature applications.



Denna post skapades 2017-09-12. Senast ändrad 2017-09-14.
CPL Pubid: 251857

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Oorganisk miljökemi

Ämnesområden

Materialkemi

Chalmers infrastruktur