Anisotropic magnetic powder and magnet thereof and method of producing same

USRE38042E1 · kind E1 · reissue

Assignee

• HITACHI, LTD. · JP

Inventors

• Minoru Endoh · Gyōda, JP
• Yasuto Nozawa · Gyōda, JP
• Katsunori Iwasaki · Gyōda, JP
• Shigeho Tanigawa · Kazo, JP
• Masaaki Tokunaga · Fukaya, JP

Key dates

• Filing date: Nov 2, 2001
• Grant date: Mar 25, 2003
• Expiry date: Nov 2, 2021

Classification

• Technology area (CPC —): General

Abstract

A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 &mgr;m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 &mgr;m, wherein R represents one or more rare earth elements including Y, TM represents Fe which may be partially substituted by Co, B boron, Ga gallium, and M one or more elements selected from the group consisting of Nb, W, V, Ta, Mo, Si, Al, Zr, Hf, P, C and Zn. This is useful for anisotropic resin-bonded magnet with high magnetic properties.