Abstract
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.
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Original Russian Text © L.M. Voronova, M.V. Degtyarev, V.F. Chukharev, T.I. Chashchukhina, V.A. Kazantsev, J.G. Krasnoperova, 2014, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2014, Vol. 78, No. 10, pp. 1251–1256.
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Voronova, L.M., Degtyarev, M.V., Chukharev, V.F. et al. Structural changes in austenitic steel in contact with solid oxide electrolyte at 950°C. Bull. Russ. Acad. Sci. Phys. 78, 1001–1006 (2014). https://doi.org/10.3103/S1062873814100244
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DOI: https://doi.org/10.3103/S1062873814100244