Structural changes in austenitic steel in contact with solid oxide electrolyte at 950°C

Changes in the structure and redistribution of alloying elements in 10Kh23N18 austenitic steel after operating at 950°C for 8800 h in contact with La-Sr-Mn-O electrolyte are investigated to establish the reasons for the degrading of the surface layer of a current collector in a solid-oxide fuel cell...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2014-10, Vol.78 (10), p.1001-1006
Main Authors: Voronova, L. M., Degtyarev, M. V., Chukharev, V. F., Chashchukhina, T. I., Kazantsev, V. A., Krasnoperova, J. G.
Format: Article
Language:English
Subjects:
Alloy steels
Alloying elements
Alloys
Aluminum oxide
Austenitic stainless steels
Electrolytes
Grain boundaries
Hadrons
Heavy Ions
Nuclear Physics
Oxides
Physics
Physics and Astronomy
Proceedings of the International Symposium “Physics of Crystals 2013”
Solid electrolytes
Solid oxide fuel cells
Structural steels
Surface layers
Thermal expansion
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Summary:Changes in the structure and redistribution of alloying elements in 10Kh23N18 austenitic steel after operating at 950°C for 8800 h in contact with La-Sr-Mn-O electrolyte are investigated to establish the reasons for the degrading of the surface layer of a current collector in a solid-oxide fuel cell over long periods of service. It is established that the degradation of the surface layer of steel is associated with the formation of a network of silicon and aluminum oxides along grain boundaries and the considerable discrepancy between the linear thermal expansion coefficients of steel and the solid electrolyte.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873814100244