Chemical segregation and precipitation at anti-phase boundaries in thermoelectric Heusler-Fe2VAl

Abstract

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Properties and influence of microstructure and crystal defects in Fe2VAl modified by laser surface remelting

“…The observed precipitates can be compared to precipitates found in melt spun Fe2VAl, as reported earlier [15]. The precipitates observed in melt spun Fe2VAl can be observed in SEM images and show sizes of approximately 200 to 300 nm and a thickness of some nm.…”

“…Therefore, the main aim is to increase phonon scattering to reduce κ. Possible approaches are doping [5][6][7], off-stoichiometric compositions [8][9][10][11], introduction of defects and disorder [12][13][14], and interfaces [15,16]. The microstructure can be manipulated by adjusting the synthesis route.…”

The Impact of Vibrational Entropy on the Segregation of Cu to Antiphase Boundaries in Fe3Al

“…The properties of iron aluminides can be fine-tuned by alloying, see, e.g., [78][79][80][81][82][83][84], but the complexity of interactions of the solute atoms with extended defects are quite rarely studied (see an example in [85]). Therefore, our study is aimed at filling in this gap in the common knowledge.…”