Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 3: Crystal Structure, Defects, Real Structure and Microstructure in Materials
KFM 3.6: Vortrag
Montag, 12. März 2018, 11:30–11:50, E 124
Phase identification in spark plasma sintered (SPS) Fe-Al-Si powders — •Jaromír Kopeček1, Jarmila Remiášová1, Ladislav Klimša1, Petr Haušild2, Miroslav Karlík2, František Laufek3, Kateřina Nová4, Jakub Šesták4, Boris Severa4, Filip Průša4, and Pavel Novák4 — 1Department of Functional Materials, Institute of Physics of the CAS, Prague, Czech Republic. — 2Department of Materials, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Czech Republic. — 3Czech Geological Survey, Prague, Czech Republic. — 4Department of Metals and Corrosion Engineering, University of Chemistry and Technology Prague, Prague, Czech Republic.
Fe-Al-Si alloys are interesting materials with promising corrosion properties. The components of such alloys are cheap, nevertheless the way of preparation is complicated and increasing the price of the product. Our group investigated properties of Fe - 20 wt. % Al - 20 wt. % Si alloy prepared by mechanical alloying followed by spark plasma sintering under various conditions. The element powders were used for mechanical alloying. The microstructure and phase composition were investigated with optical and electron microscopies (including EDS and EBSD) and X-ray diffraction. It was found that mechanically alloyed powders contain mainly of-stoichiometric binary phases, whereas sintered samples contain significant amount of ternary phase. The phase description is complicated as the phases dimensions are small and composition is off-stoichiometric both in powders or compacted alloys.