Short range ordering in undercooled Fe3Al

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摘要：

Alloys of Fe-27 at.% Al were prepared far from thermodynamic equilibrium by ultra-rapid quenching from the melt. The hyperfine magnetic field (hmf) distribution revealed a wide variety of local Al environments around 57 Fe atoms. Upon low temperature annealing, the probabilities of these different Al environments changed at different rates. The "kinetic path" of short range ordering in Fe 3 Al is consistent with that found in a previous study of long range ordering, where B2 order grows more rapidly than D0 3 order at lower temperatures.

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关键词：

Experimental/ aluminium alloys annealing crystal atomic structure of alloys crystal hyperfine field interactions iron alloys Mossbauer effect order-disorder transformations short-range order/ kinetic path Mossbauer spectra ultra-rapid quenching hyperfine magnetic field local Al environments 57Fe atoms low temperature annealing short range ordering undercooled Fe 3Al / A6155H Crystal structure of specific alloys A7680 Moumlssbauer effect other gamma-ray spectroscopy in condensed matter A6150K Crystallographic aspects of polymorphic and order-disorder transformations A7170J Nuclear states and interactions (condensed matter) A7170C Crystal and ligand fields/ Fe3Al/bin Fe3/bin Al/bin Fe/bin