Title:
フェライトと置き換えるための高度に急冷可能なFe系希土材料
Document Type and Number:
Japanese Patent JP4755080
Kind Code:
B2
Abstract:
The present invention relates to highly quenchable Fe-based rare earth magnetic materials that are made by rapid solidification process and exhibit good magnetic properties and thermal stability. More specifically, the invention relates to isotropic Nd-Fe-B type magnetic materials made from a rapid solidification process with a lower optimal wheel speed and a broader optimal wheel speed window than those used in producing conventional magnetic materials. The materials exhibit remanence (Br) and intrinsic coercivity (Hci) values of between 7.0 to 8.5 kG and 6.5 to 9.9 kOe, respectively, at room temperature. The invention also relates to process of making the materials and to bonded magnets made from the magnetic materials, which are suitable for direct replacement of anisotropic sintered ferrites in many applications.
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Inventors:
Chen, Zhongmin
Smith, Benjamin, Earl.
Ma, Bao-Ming
Harchen Lauder, James, Earl.
Smith, Benjamin, Earl.
Ma, Bao-Ming
Harchen Lauder, James, Earl.
Application Number:
JP2006503343A
Publication Date:
August 24, 2011
Filing Date:
February 05, 2004
Export Citation:
Assignee:
Magnequench, Incorporated
International Classes:
H01F1/053; B22F1/00; B22F3/00; B22F9/08; C21D6/00; C22C33/02; C22C38/00; H01F1/057; H01F1/08; H01F7/02
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Attorney, Agent or Firm:
Yusuke Hiraki
Satoshi Fujita
Eiichi Arai
Natsuo Tanaka
Satoshi Fujita
Eiichi Arai
Natsuo Tanaka