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Chemical segregation and precipitation at anti-phase boundaries in thermoelectric Heusler-Fe2VAl.
- Source :
-
Scripta Materialia . Sep2020, Vol. 186, p370-374. 5p. - Publication Year :
- 2020
-
Abstract
- Fe 2 VAl exhibits promising properties for thermoelectric applications. Here, we investigated the microstructure of melt spun Fe 2 VAl using electron microscopy, atom probe tomography and field ion microscopy. We observe platelet-shaped VC x N y precipitates in the vicinity of antiphase boundaries (APB) oriented along the {100}-plane. The mean distance between these precipitates is (140 ± 40) nm. This distance is shorter than the mean free phonon path at room temperature in Fe 2 VAl. Thus, these VC x N y precipitates, combined with the APB may efficiently lower the thermal conductivity of the alloy. Image, graphical abstract [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13596462
- Volume :
- 186
- Database :
- Academic Search Index
- Journal :
- Scripta Materialia
- Publication Type :
- Academic Journal
- Accession number :
- 143879086
- Full Text :
- https://doi.org/10.1016/j.scriptamat.2020.04.037