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

Solute clustering and partitioning in new Fe–B-based soft magnetic materials with high saturation magnetic flux density ( B s), (Fe 0.85B 0.15) 100− x Cu x ( x = 0.0, 1.0, and 1.5) and Fe 82.65Cu 1.35Si y B 16− y ( y = 0.0, 2.0, and 5.0) melt-spun alloys, were investigated by three-dimensional atom...

Full description

Saved in:
Bibliographic Details
Published in:Acta materialia 2009-09, Vol.57 (15), p.4463-4472
Main Authors: Chen, Y.M., Ohkubo, T., Ohta, M., Yoshizawa, Y., Hono, K.
Format: Article
Language:English
Subjects:
Amorphous alloy
Applied sciences
Exact sciences and technology
Metals. Metallurgy
Nanocrystal
Softmagnetic material
Three-dimensional atom probe
Transmission electron microscopy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Solute clustering and partitioning in new Fe–B-based soft magnetic materials with high saturation magnetic flux density ( B s), (Fe 0.85B 0.15) 100− x Cu x ( x = 0.0, 1.0, and 1.5) and Fe 82.65Cu 1.35Si y B 16− 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 α-Fe. While annealing the Si-free alloys at 410 °C led to the precipitation of Fe 3B, only α-Fe nanocrystals were observed in the Si-containing alloys. Lorenz TEM observation indicated the Fe 3B particles pin magnetic domain walls. The Fe 82.65Cu 1.35Si y B 16− y alloy with y = 2.0 crystallized by annealing at 400 °C exhibited optimal nanocrsytal/amorphous microstructure without the precipitation of Fe 3B, which led to the lowest coercivity while keeping a high B s ∼1.85 T.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2009.06.008