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:
Sep. 10, 2019
Filed:
Aug. 08, 2014
Applicant:
Tdk Corporation, Tokyo, JP;
Inventors:
Assignee:
TDK CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/059 (2006.01); B22F 1/00 (2006.01); C22C 38/00 (2006.01); H01F 1/057 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); C22C 38/16 (2006.01); H02K 1/02 (2006.01); H02K 1/27 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/059 (2013.01); B22F 1/0003 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); C22C 38/16 (2013.01); H01F 1/0577 (2013.01); H02K 1/02 (2013.01); H02K 1/2706 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); H01F 41/0293 (2013.01);
Abstract
An R-T-B based sintered magnet has excellent corrosion resistance together with good magnetic properties. The R-T-B based sintered magnet contains RTB grains, wherein, an R—Cu-M-C concentrated part is existed in a grain boundary formed between or among two or more adjacent RTB grains, and the concentrations of R (R is at least one from Sc, Y and the lanthanoide element), Cu, M (M is at least one from Ga, Si, Sn, Ge and Bi) and C in the R—Cu-M-C concentrated part are higher than those in the RTB grains respectively.