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Coatings for SOFC interconnects in fuel side environments

Rakshith Nugehalli Sachitanand (Institutionen för kemi och kemiteknik, Oorganisk miljökemi) ; Mohammad Sattari (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)
14th International Symposium on Solid Oxide Fuel Cells, SOFC 2015, held as part of the Electrochemical Society, ECS Conference on Electrochemical Energy Conversion and Storage, Glasgow, United Kingdom, 26-31 July 2015 (1938-5862). Vol. 68 (2015), 1, p. 1575-1580.
[Konferensbidrag, refereegranskat]

This study focuses on examining the effect of PVD coatings on the oxidation performance of interconnects in fuel side environments. The ferritic steels Sanergy HT and AISI 441 were coated with nanoscale thick rare earth oxides of Ce and La. Additionally, Sanergy HT was also coated with Cu, Co and Ce/Co. The samples were exposed at 850°C in Ar-5% H2-3% H2O in a tubular furnace. Chemical analysis on the samples was subsequently performed with SEM/EDX and XRD. It was established that the Ce and La coatings brought about a ≈4x reduction in the oxidation rate while the presence of a metallic phase in the oxide (Cu and Co) negatively affected oxidation performance. Further, the La coating resulted in the formation of a perovskite phase, showing that the intrinsic electronic properties of the oxide can be tailored using coatings.



Denna post skapades 2015-10-06.
CPL Pubid: 223699

 

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Institutioner (Chalmers)

Institutionen för kemi och kemiteknik, Oorganisk miljökemi

Ämnesområden

Korrosionsteknik
Materialteknik
Nanoteknik

Chalmers infrastruktur