Magnetic properties of Fe-Co alloys produced by powder metallurgy

Author

Yamagishi, W. ; Hashimoto, K. ; Sato, T. ; Ogawa, S. ; Henmi, Z.

Author_Institution

FUJITSU Laboratories Ltd., Atsugi, Japan

Volume

22

Issue

5

fYear

1986

fDate

9/1/1986 12:00:00 AM

Firstpage

641

Lastpage

643

Abstract

Powder metallurgical techniques were applied to the production of Fe-50wt%Co alloy which, because of its high magnetization, shows the greatest promise for applications such as magnetic cores and pole pieces. To obtain a sintered Fe-50wt%Co alloy with good magnetic properties, we tried to improve the sintering process by using a mixture of pre-alloyed Fe-rich Fe-Co powder and fine Co powders. The effect of the Fe content of the pre-alloyed Fe-Co powders was investigated over a range of 50 to 90 wt%. The effect of the Co powder particle size at -325 and -400 mesh was also examined. As a result, we obtained a sintered Fe-50wt%Co alloy with a relative density of 95%, using a mixture of pre-alloyed 80wt%Fe-Co powder and -400 mesh Co powder. This sintered Fe-50wt%Co alloy has the following magnetic properties; a magnetization of 2.15 T in a magnetic field of 4 kA/m, and a coercive force of 160 A/m.

Keywords

Powdered magnetic materials/devices; Soft magnetic materials/devices; Atmospheric measurements; Cobalt alloys; Density measurement; Iron alloys; Magnetic field measurement; Magnetic materials; Magnetic properties; Powders; Production; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1986.1064426

Filename

1064426