The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 2017
Filed:
Oct. 08, 2010
Applicants:
Yoshinobu Honkura, Tokai, JP;
Chisato Mishima, Tokai, JP;
Masao Yamazaki, Tokai, JP;
Inventors:
Assignee:
AICHI STEEL CORPORATION, Aichi-ken, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 1/09 (2006.01); H01F 7/02 (2006.01); H01F 41/02 (2006.01); B22F 1/02 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/16 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0293 (2013.01); B22F 1/025 (2013.01); C22C 33/0278 (2013.01); C22C 38/005 (2013.01); C22C 38/06 (2013.01); C22C 38/16 (2013.01); H01F 1/0578 (2013.01); H01F 7/0221 (2013.01); H01F 1/0572 (2013.01);
Abstract
The anisotropic rare earth magnet powder of the present invention includes powder particles having RTMB-type crystals of a tetragonal compound of a rare earth element (R), boron (B), and a transition element (TM) having an average crystal grain diameter of 0.05 to 1 μm, and enveloping layers containing at least a rare earth element (R') and copper (Cu) and enveloping surfaces of the crystals. Owing to the presence of the enveloping layers, coercivity of the anisotropic rare earth magnet powder can be remarkably enhanced without using a scarce element such as Ga and Dy.