Three-dimensional atom probe study of Fe-B-based nanocrystalline soft magnetic materials

被引：107

作者：

Chen, Y. M. ^{[2
]}

Ohkubo, T. ^{[1
,3
]}

Ohta, M. ^{[4
]}

Yoshizawa, Y. ^{[4
]}

Hono, K. ^{[1
,2
,3
]}

机构：

[1] Natl Inst Mat Sci, Magnet Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050047, Japan

[3] Japan Sci & Technol Agcy, CREST, Tokyo, Japan

[4] Hitachi Met Ltd, Mat Dev Lab, New Business Dev Ctr, Kumagaya, Saitama 3600843, Japan

来源：

ACTA MATERIALIA | 2009年 / 57卷 / 15期

关键词：

Amorphous alloy; Nanocrystal; Softmagnetic material; Three-dimensional atom probe; Transmission electron microscopy; ALLOYS; MICROSTRUCTURE; CRYSTALLIZATION; M=ZR;

D O I：

10.1016/j.actamat.2009.06.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Solute clustering and partitioning in new Fe-B-based soft magnetic materials with high saturation magnetic flux density (B-s), (Fe0.85B0.15)(100-x)Cu-x (x = 0.0, 1.0, and 1.5) and Fe82.65Cu1.35SiyB16-y (y = 0.0, 2.0, and 5.0) melt-spun alloys, were investigated by three-dimensional atom probe and transmission electron microscopy. Although Cu clusters form after annealing in all the samples, it was found that only the clusters of 4-6 nm can serve as heterogeneous nucleation sites for alpha-Fe. While annealing the Si-free alloys at 410 degrees C led to the precipitation of Fe3B, only alpha-Fe nanocrystals were observed in the Si-containing alloys. Lorenz TEM observation indicated the Fe3B particles pin magnetic domain walls. The Fe82.65Cu1.35SiyB16-y alloy with y = 2.0 crystallized by annealing at 400 degrees C exhibited optimal nanocrsytal/amorphous microstructure without the precipitation of Fe3B, which led to the lowest coercivity while keeping a high B-s similar to 1.85 T. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4463 / 4472

页数：10