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:
Mar. 10, 2020
Filed:
Jan. 25, 2017
Ut-battelle, Llc, Oak Ridge, TN (US);
Iowa State University Research Foundation, Inc., Ames, IA (US);
Lawrence Livermore National Laboratory, Livermore, CA (US);
Mariappan Parans Paranthaman, Knoxville, TN (US);
Michael A. McGuire, Knoxville, TN (US);
David S. Parker, Oak Ridge, TN (US);
Orlando Rios, Knoxville, TN (US);
Brian C. Sales, Lenoir City, TN (US);
Huseyin Ucar, Auburndale, FL (US);
Scott K. McCall, Livermore, CA (US);
R. William McCallum, Ames, IA (US);
Cajetan I. Nlebedim, Ames, IA (US);
UT-BATTELLE, LLC, Oak Ridge, TN (US);
IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US);
LAWRENCE LIVERMORE NATIONAL SECURITY, LLC, Livermore, CA (US);
Abstract
A bulk high performance permanent magnet comprising a neodymium-iron-boron core having an outer surface, and a coercivity-enhancing element residing on at least a portion of said outer surface, with an interior portion of said neodymium-iron-boron core not having said coercivity-enhancing element therein. Also described herein is a method for producing the high-coercivity bulk permanent magnet, the method comprising: (i) depositing a coercivity-enhancing element on at least a portion of an outer surface of a neodymium-iron-boron core substrate to form a coated permanent magnet; and (ii) subjecting the coated permanent magnet to a pulse thermal process that heats said outer surface to a substantially higher temperature than an interior portion of said neodymium-iron-boron core substrate, wherein said substantially higher temperature is at least 200° C. higher than said interior portion and is of sufficient magnitude to induce diffusion of said coercivity-enhancing element below said outer surface but outside of said interior portion.