Structural Heterogeneity of the Melt-spun (Fe, Co)-Si-B-P-Cu Alloy with Excellent Soft Magnetic Properties
Structural Heterogeneity of the Melt-spun (Fe, Co)-Si-B-P-Cu Alloy with Excellent Soft Magnetic Properties
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DOI：
10.1016/j.phpro.2015.12.154
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Kazuhisa Sato;K. Takenaka;A. Makino;Y. Hirotsu
中科院分区：
文献类型：
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作者：
Kazuhisa Sato;K. Takenaka;A. Makino;Y. Hirotsu
用透射电镜（TEM）和电子衍射（EDS）研究了新研制的快淬软磁合金Fe_（81.2）Co_（4Si）_（0.5）B_（9.5）P_（4Cu）_（0.8）的结构不均匀性。空心锥暗场TEM成像显示，淬火态Fe 81. 2Co 4Si 0. 5 B 9. 5 P4 Cu 0. 8合金中的相干散射区密度与Fe 85. 2Si 2B 8 P4 Cu 0. 8异质非晶合金（NANOMET®）中的一样高。根据像差校正的高分辨率TEM，结晶原子团簇，直径通常为0.1nm，密集地分布在非晶基体的Fe 81.2Co4Si 0.5B9.5P4Cu 0.8合金，而纳米束电子衍射检测到弱布拉格反射从Fe团簇与体心立方结构。这些结果明确地揭示了淬火态Fe81.2Co4Si0.5B9.5P4Cu0.8合金的结构异质性，这与在NANOMET®中观察到的结构异质性相似。
A structural heterogeneity of a newly developed soft magnetic Fe81.2Co4Si0.5B9.5P4Cu0.8 melt-spun alloy has been studied by transmission electron microscopy (TEM) and electron diffraction. Hollow-cone dark-field TEM imaging revealed that the density of coherent scattering regions in the as-quenched Fe81.2Co4Si0.5B9.5P4Cu0.8alloy is as high as that in the Fe85.2Si2B8P4Cu0.8hetero-amorphous alloy (NANOMET®). According to the aberration-corrected high-resolution TEM, crystalline atomic clusters, typically of ∼1 nm in diameter, are densely distributed in an amorphous matrix of Fe81.2Co4Si0.5B9.5P4Cu0.8alloy, while nanobeam electron diffraction detected weak Bragg reflections from Fe clusters with the body centered cubic structure. These results unambiguously reveal structural heterogeneity of the as-quenched Fe81.2Co4Si0.5B9.5P4Cu0.8alloy, which is similar to that observed in the NANOMET®.