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:
Feb. 25, 2025
Filed:
Mar. 08, 2019
Hitachi, Ltd., Tokyo, JP;
Matahiro Komuro, Tokyo, JP;
Yuichi Satsu, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided are: a sintered magnet having an improved maximum energy product while maintaining the magnetic coercivity of the magnet; and a production method for such a sintered magnet. The sintered magnet () according to the present invention comprises particles () each including: a main phase () in which the main component is a compound containing a rare-earth element and iron; and a diffusion layer () provided on the surface of the main phase (). The diffusion layers () are characterized by: containing, as a main component, a compound resulting from a solid-solution of carbon and/or nitrogen in said compound of the main phase (); and having a concentration gradient of carbon and/or nitrogen from the surfaces of the particles () toward the interior thereof.