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2023
ACL
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František Šimko, Zoltán Lenčéš, Young-Wook Kim, Martin Nosko, Martin Kontrík, Michal Korenko, 'High temperature corrosion resistance of electrically conductive nitrogen doped silicon carbide ceramics in molten fluorides', J. Eur. Ceram. Soc. 43 3931-3940 (2023) doi:10.1016/j.jeurceramsoc.2023.03.001
Electrically conductive nitrogen-doped SiC ceramics were exposed to molten FLiNaK at 700 °C for 100, 200, and 500 h, and at 1000 °C for 100 h in Ar atmosphere. The SEM-EDX investigations of corroded samples showed that the main corrosion attack proceeds through the intergranular phase, where the fluoride melt interacts with the oxide phases and partly dissolves also the SiC grains. It was proved that N-doped SiC has good corrosion resistance against molten FLiNaK. After corrosion at 700 °C for 100, 200, and 500 h the corroded layer thicknesses were 85, 90, and 120 µm, respectively.
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