Changes in microstructure and soft magnetic properties of an Fe 86 Zr 7 B 6 Cu 1 amorphous alloy upon crystallization

Kiyonori Suzuki, Michio Kikuchi, Akihiro Makino, Akihisa Inoue, Tsuyoshi Masumoto

研究成果: Article

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In order to clarify the dominant factors for excellent soft magnetic properties of nanocrystalline bcc Fe-Zr-B alloys, we examined the change in the microstructure, soft magnetic properties and magnetostriction (λ s ) of an Fe 86 Zr 7 B 6 Cu 1 amorphous alloy upon crystallization. The amorphous phase changed to a mostly single bcc phase with a grain size of about 10 nm by annealing for 3.6 ks at temperatures between 773 and 923 K. The phase transition causes a marked reduction of λ s from 16.6 × 10 -6 to an extremely low value of 10 -7 . The permeability (μ c ) also increased significantly by the transition to the nanocrystalline bcc phase and reached a maximum value of 48000 at T a =873 K at which the λ s approaches zero value. Thus, the excellent soft magnetic properties seem to result from the simultaneous satisfaction of small λ s and nanocrystalline bcc structure. Consequently, it appears important for the achievement of the good soft magnetic properties that the nanocrystalline structure remains almost unchanged up to the high temperature range where the nearly zero λ s value is obtained. Based on the data for the temperature dependence of magnetization and μ e , it is presumed that the high thermal stability of the nanocrystalline bcc phase is due to the presence of an amorphous thin layer with higher Zr and B contents along the grain boundary of the bcc phase.

元の言語English
ページ(範囲)961-968
ページ数8
ジャーナルMaterials Transactions, JIM
32
発行部数10
DOI
出版物ステータスPublished - 1991 1 1

ASJC Scopus subject areas

  • Engineering(all)

フィンガープリント Changes in microstructure and soft magnetic properties of an Fe <sub>86</sub> Zr <sub>7</sub> B <sub>6</sub> Cu <sub>1</sub> amorphous alloy upon crystallization' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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