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:
Nov. 12, 2019
Filed:
Mar. 13, 2014
Intermetallics Co., Ltd., Nakatsugawa-shi, Gifu, JP;
Daido Steel Co., Ltd., Nagoya-shi, Aichi, JP;
INTERMETALLICS CO., LTD., Nakatsugawa, JP;
DAIDO STEEL CO., LTD., Nagoya, JP;
Abstract
A method for producing an RFeB system magnet with high coercivity by preventing a coating material from peeling off the surface of a base material during a grain boundary diffusion treatment is provided. A method for producing an RFeB system magnet which is a sintered magnet or a hot-deformed magnet containing, as the main rare-earth element, a light rare-earth element Rwhich is at least one of the two elements of Nd and Pr, the method including: applying, to a surface of a base material M of the RFeB system magnet, a coating material prepared by mixing a silicone grease and an R-containing powder containing a heavy rare-earth element Rcomposed of at least one element selected from the group of Dy, Tb and Ho; and heating the base material together with the coating material. Improved coating and base materials adhesion facilitates transfer of Rinto base material grain boundaries.