Magnetization Process in Co-Zr-B permanent-magnet materials

Author

Saito, Tetsuji

Author_Institution

Dept. of Mech. Sci. & Eng., Chiba Inst. of Technol., Japan

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2919

Lastpage

2921

Abstract

Co-Zr-B alloy ingots consisted of Co₂₃Zr₆ phase together with the small amounts of Co₅Zr and Co₃ZrB₂ phases. On the other hand, Co-Zr-B melt-spun ribbons consisted mostly of Co₅Zr phase and exhibited a high coercivity. Heat treatment of the Co-Zr-B melt-spun ribbons resulted in increased coercivity. These annealed Co-Zr-B melt-spun ribbons were magnetically isotropic. The maximum energy products (BH)_max values in excess of 4.7 MGOe were observed for the Co-Zr-B melt-spun ribbons annealed at 600°C for 1 h. The mechanism underlying the coercivity of the annealed Co-Zr-B melt-spun ribbon was found to be the pinning type from the initial magnetization curve.

Keywords

boron alloys; cobalt alloys; coercive force; magnetic anisotropy; magnetic annealing; melt spinning; permanent magnets; thermomagnetic treatment; zirconium alloys; CoZrB; annealing; coercivity; heat treatment; magnetization process; melt-spun ribbons; permanent-magnet materials; solidification processing; Annealing; Argon; Atmosphere; Cobalt alloys; Coercive force; Diffraction; Magnetic materials; Magnetization; X-ray scattering; Zirconium; Co–Zr–B alloys; magnetization; permanent magnets; rapid solidification processing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.834213

Filename

1325685