Magnetic properties of (Fe,Co)-B-Al-Nb alloys with ultrafine grain structure

Author

Cho, Y.S. ; Kim, Y.B. ; Kim, C.S. ; Lee, K.H. ; Kim, T.K.

Author_Institution

Korea Res. Inst. of Stand. & Sci., Taejon, South Korea

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4869

Lastpage

4871

Abstract

The magnetic properties of (Fe,Co)-B-Al-Nb alloys prepared by rapid solidification process have been studied for the development of a new type Fe-based nanocrystalline alloy. Microstructure composed of ultrafine bcc Fe(Co) has been obtained directly from the rapid solidification by adding 10 at.% Al to (Fe_0.85Co_0.15)₈₀B₂₀ alloy. Furthermore, the addition of 2~6 at% Nb to (Fe_0.85Co_0.15)₇₀B₂₀Al₁₀ alloy decreases the saturation magnetostriction below 5 ppm. Heat treatment of as-prepared alloys further improves its soft magnetic properties in high frequency range. (Fe_0.85Co _0.15)₇₀B₁₈Al₁₀Nb₂ alloy annealed at 400°C for 1 h shows the microstructure composed of ultrafine grains of about 8 nm and the most improved magnetic properties among the prepared alloys

Keywords

alloying additions; boron alloys; cobalt alloys; crystal microstructure; ferromagnetic materials; grain size; iron alloys; magnetostriction; nanostructured materials; niobium alloys; rapid solidification; soft magnetic materials; (Fe,Co)-B-Al-Nb alloys; (FeCo)BAlNb; 1 h; 400 C; heat treatment; magnetic properties; microstructure; nanocrystalline alloy; rapid solidification process; saturation magnetostriction; soft magnetic properties; ultrafine grain structure; ultrafine grains; Aluminum alloys; Annealing; Cobalt alloys; Frequency; Heat treatment; Iron alloys; Magnetic properties; Magnetostriction; Microstructure; Niobium alloys;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334249

Filename

334249