Title:
希土類元素・鉄・ボロン系永久磁石およびその製造方法
Document Type and Number:
Japanese Patent JP3549382
Kind Code:
B2
Abstract:
Disclosed is a method for the preparation of a novel composite rare earth-based magnetically anisotropic sintered permanent magnet in which: (a) a base alloy consisting of a host phase of R2T14B (R: a rare earth element; T: iron or a combination of iron and cobalt) having a particle diameter of 2 to 10 mu m and containing in each particle a phase rich in the content of T and having a particle diameter not exceeding 1 mu m is prepared by the strip casting method; (b) the base alloy is crushed; (c) the base alloy powder is blended in a specified proportion with a powder of an auxiliary alloy of R-T or R-T-B in a specified proportion; (d) the powder blend is subjected to further comminution; (e) the comminuted powder blend is subjected to compression-molding in a magnetic field into a powder compact; and (f) the powder compact is sintered by a heat treatment.
Inventors:
Suguru Ito
Ken Ohashi
Yoshio Tawara
Tadao Nomura
Minowa Takehisa
Ken Ohashi
Yoshio Tawara
Tadao Nomura
Minowa Takehisa
Application Number:
JP35275897A
Publication Date:
August 04, 2004
Filing Date:
December 22, 1997
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C22C33/02; C22C38/00; H01F1/053; H01F1/057; H01F1/08; H01F41/02; (IPC1-7): H01F1/08; C22C33/02; C22C38/00; H01F1/053; H01F41/02
Domestic Patent References:
| JP4338607A | ||||
| JP7263210A | ||||
| JP1146309A | ||||
| JP5029117A | ||||
| JP6207204A | ||||
| JP7272914A |
Attorney, Agent or Firm:
Kanji Arai
Eiichiro Shimazaki
Eiichiro Shimazaki