Title:
希土類-鉄-硼素系磁石用合金粉末を用いた焼結磁石
Document Type and Number:
Japanese Patent JP4389427
Kind Code:
B2
Abstract:
A rare-earth-iron-boron based alloy powder, in which a heavy rare-earth element such as Dy is present at a higher concentration in a main phase than in a grain boundary phase and which can be sintered easily, and a method of making such an alloy powder are provided. A rare-earth-iron-boron based magnet alloy according to the present invention includes, as a main phase, a plurality of R2Fe14B type crystals (where R is at least one element selected from the group consisting of the rare-earth elements and yttrium) in which rare-earth-rich phases are dispersed. The main phase includes Dy and/or Tb at a higher concentration than a grain boundary phase does.
Inventors:
Hiroyuki Tomizawa
Yuji Kaneko
Chiori Odaka
Yuji Kaneko
Chiori Odaka
Application Number:
JP2002028207A
Publication Date:
December 24, 2009
Filing Date:
February 05, 2002
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
B22D11/06; C22C38/00; B22F1/00; B22F9/04; C22C1/04; C22C19/07; C22C33/02; C22C38/06; C22C38/10; C22C38/16; H01F1/053; H01F1/057; H01F1/06; H01F41/02
Domestic Patent References:
| JP8013078A | ||||
| JP6124824A |
Foreign References:
| WO2000012771A1 |
Attorney, Agent or Firm:
Seiji Okuda