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:
Jul. 12, 2022
Filed:
Mar. 22, 2021
Tdk Corporation, Tokyo, JP;
Hiroki Kawamura, Tokyo, JP;
Makoto Iwasaki, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
An R—T—B based rare earth sintered magnet in which R is a rare earth sintered magnet, T is an iron group element, and B is boron. R includes one or more selected from Nd and Pr. The R—T—B based rare earth sintered magnet includes M and C in which M is one ore more selected from Zr, Ti, and Nb. The R—T—B based rare earth sintered magnet includes main phase grains and grain boundaries, and the grain boundaries includes a coexisting part in which a M—C compound, a M—B compound, and a 6-13-1 phase coexist. The R—T—B based rare earth sintered magnet attains improved HcJ while maintaining good Br and Hk/HcJ.