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:
Apr. 07, 2020
Filed:
Mar. 09, 2017
Applicant:
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 41/02 (2006.01); H01F 1/057 (2006.01); B22F 3/10 (2006.01); B22F 3/26 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/10 (2006.01); C22C 38/16 (2006.01); C22C 33/02 (2006.01); B22F 1/02 (2006.01); B22F 3/12 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); B32B 15/01 (2006.01); C22C 19/07 (2006.01); H01F 1/055 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0293 (2013.01); B22F 1/025 (2013.01); B22F 3/12 (2013.01); B22F 3/24 (2013.01); B22F 9/04 (2013.01); B32B 15/01 (2013.01); C22C 19/07 (2013.01); C22C 33/0278 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/06 (2013.01); C22C 38/10 (2013.01); C22C 38/16 (2013.01); H01F 1/0557 (2013.01); B22F 2003/248 (2013.01); B22F 2009/041 (2013.01); B22F 2009/042 (2013.01); B22F 2009/044 (2013.01); B22F 2301/155 (2013.01); B22F 2301/355 (2013.01); B22F 2998/10 (2013.01); H01F 1/0577 (2013.01);
Abstract
A sintered magnet body (RTMB) coated with a powder mixture of an intermetallic compound (RM, RTM, RMH), alloy (MM) or metal (M) powder and a rare earth (R) oxide is diffusion treated. The Roxide is partially reduced during the diffusion treatment, so a significant amount of Rcan be introduced near interfaces of primary phase grains within the magnet through the passages in the form of grain boundaries. The coercive force is increased while minimizing a decline of remanence.