Direct imaging of structural heterogeneity of the melt-spun Fe85.2Si2B8P4Cu0.8 alloy

作者：Sato Kazuhisa^*; Takenaka Kana; Makino Akihiro; Hirotsu Yoshihiko

来源：AIP Advances, 2015, 5(6): 067166.

DOI：10.1063/1.4923329

A structural heterogeneity of the melt-spun Fe85.2Si2B8P4Cu0.8 alloy has been studied by spherical aberration (C-s) corrected high-resolution transmission electron microscopy. Hollow-cone illumination imaging revealed that the density of coherent scattering regions in the as-quenched Fe85.2Si2B8P4Cu0.8 alloy is much higher than that in the Fe76Si9B10P5 bulk metallic glass. According to the C-s-corrected TEM, crystalline atomic clusters, typically of similar to 1 nm in diameter, are densely distributed in an amorphous matrix of Fe85.2Si2B8P4Cu0.8 alloy. Observation of four-fold and six-fold atomic arrangements of these clusters implies existence of Fe clusters with the body centered cubic structure. These Fe clusters must be responsible for the formation of ultrahigh-density alpha-Fe nanocrystals produced by post-annealing.

• 出版日期2015-6