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Influence of Gaseous Media Flow in the Dual Ar-H2-H2O/air Atmosphere Setup on the Scale Growth Kinetics of Crofer 22APU Ferritic Stainless Steel

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Abstract

The problem of gaseous media distribution within the metallic interconnects in solid oxide fuel cells (SOFCs) and its influence on the oxidation resistance of the applied materials is currently of great interest. In the presented work, an influence of gas flow within the dual Ar-H2-H2O/air atmosphere experimental setup on the oxidation behavior of the Crofer 22APU ferritic stainless steel was investigated. Examination of the sample oxidized for 1000 h in temperature of 800 °C revealed the presence of coaxial regions on the scale surface, with the differences in scale’s thicknesses in those regions being clearly visible. Additionally, the morphology of the surface changed significantly in a function of the radial distance from the sample’s center. To further examine the phenomena of uneven gas distribution, a model of the dual-atmosphere setup was created, using Ansys Workbench software. Obtained results suggest that the correlation between scale morphology and distribution of temperature and pressure on the sample’s surface, created by gas flow in the system, can be justified.

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Acknowledgments

The financial support of the National Science Centre for PRELUDIUM 6 project no. 2013/11/N/ST5/01391 (reg. number) is gratefully acknowledged.

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Authors and Affiliations

  1. AGH University of Science and Technology; Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059, Krakow, Poland

    Mirosław Stygar, Juliusz Dąbrowa, Piotr Dziembaj & Tomasz Brylewski

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  1. Mirosław Stygar
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  2. Juliusz DÄ…browa
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  3. Piotr Dziembaj
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  4. Tomasz Brylewski
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Correspondence to Mirosław Stygar.

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Stygar, M., Dąbrowa, J., Dziembaj, P. et al. Influence of Gaseous Media Flow in the Dual Ar-H2-H2O/air Atmosphere Setup on the Scale Growth Kinetics of Crofer 22APU Ferritic Stainless Steel. J. of Materi Eng and Perform 26, 540–546 (2017). https://doi.org/10.1007/s11665-016-2490-9

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  • DOI: https://doi.org/10.1007/s11665-016-2490-9

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