|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Microstructural Characterization of Oxide Layers Formed on Fe-Cr-Al-steels during the Exposure to Heavy Liquid Metals
||Miroslav Popovic, Alan Bolind, Peter Hosemann, Mark Asta, Jan Schroers
|On-Site Speaker (Planned)
In exposure to heavy liquid metals that contain dissolved oxygen, steels can develop protective oxide scales that inhibit dissolution corrosion. These scales often consist of several oxides, some of them having a complex structure, especially if the steel contains multiple oxide-forming constituent elements. The structural properties of these oxides determine the diffusion properties of solid- and liquid-phase elements through these oxides, and thereby the extent of the penetration of the liquid-metal elements into the steel and the dissolution of steel elements into the liquid. In this work, the microstructure and diffusion properties of the oxide layers formed on Fe-Cr-Al-steels after exposure to liquid lead-bismuth-eutectic alloy in oxygen-controlled atmosphere have been characterized by SEM/EDS, X-ray diffraction, TEM, XPS and Raman spectroscopy. The ultimate goals have been to determine the oxide phases present in the scales, and to understand their evolution (as a function of temperature and oxygen concentration) and some side-effects.
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