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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.:

US 10074477 B1

PDFFull Text
Date of Patent:
Sep. 11, 2018

Filed:

Dec. 12, 2016

Rare earth sintered magnet and making method

Applicant:

Shin-etsu Chemical Co., Ltd., Tokyo, JP;

Inventors:

Hiroaki Nagata, Echizen, JP;

Yuuji Gouki, Echizen, JP;

Kazuaki Sakaki, Echizen, JP;

Tadao Nomura, Echizen, JP;

Koichi Hirota, Echizen, JP;

Hajime Nakamura, Echizen, JP;

Assignee:

SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Jessee Roe

Int. Cl.
CPC ...
H01F 1/057 (2006.01); H01F 41/02 (2006.01); H01F 1/053 (2006.01); B22F 3/10 (2006.01); B22F 3/26 (2006.01); C22C 38/60 (2006.01); C22C 38/20 (2006.01); C22C 38/16 (2006.01); C22C 38/14 (2006.01); C22C 38/12 (2006.01); C22C 38/10 (2006.01); C22C 38/06 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C21D 6/00 (2006.01); B22F 3/24 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0293 (2013.01); B22F 3/1017 (2013.01); B22F 3/26 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/007 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/105 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/20 (2013.01); C22C 38/60 (2013.01); H01F 1/0536 (2013.01); H01F 41/0266 (2013.01); B22F 2003/248 (2013.01); B22F 2301/35 (2013.01); B22F 2998/10 (2013.01);
Abstract

A rare earth sintered magnet is an anisotropic sintered body comprising NdFeB crystal phase as primary phase and having the composition RTMSiBwherein Ris a rare earth element inclusive of Sc and Y, T is Fe and/or Co, M is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, 'a' to 'e' are 12≤a≤17, 0≤c≤10, 0.3≤d≤7, 5≤e≤10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.

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