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

Kazuhisa Sato; Kana Takenaka; Akihiro Makino; Yoshihiko Hirotsu

doi:10.1063/1.4923329

Direct imaging of structural heterogeneity of the melt-spun Fe_85.2Si₂B₈P₄Cu_0.8 alloy

Kazuhisa Sato, Kana Takenaka, Akihiro Makino, Yoshihiko Hirotsu

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Abstract

A structural heterogeneity of the melt-spun Fe_85.2Si₂B₈P₄Cu_0.8 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 Fe_85.2Si₂B₈P₄Cu_0.8 alloy is much higher than that in the Fe₇₆Si₉B₁₀P₅ bulk metallic glass. According to the C_s-corrected TEM, crystalline atomic clusters, typically of ∼1 nm in diameter, are densely distributed in an amorphous matrix of Fe_85.2Si₂B₈P₄Cu_0.8 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 α-Fe nanocrystals produced by post-annealing.

Original language	English
Article number	067166
Journal	AIP Advances
Volume	5
Issue number	6
DOIs	https://doi.org/10.1063/1.4923329
Publication status	Published - 2015 Jun 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "A structural heterogeneity of the melt-spun Fe85.2Si2B8P4Cu0.8 alloy has been studied by spherical aberration (Cs) 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 Cs-corrected TEM, crystalline atomic clusters, typically of ∼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 α-Fe nanocrystals produced by post-annealing.",

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AU - Sato, Kazuhisa

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AU - Makino, Akihiro

AU - Hirotsu, Yoshihiko

PY - 2015/6/1

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Direct imaging of structural heterogeneity of the melt-spun Fe_85.2Si₂B₈P₄Cu_0.8 alloy

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