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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 10312019 B1

PDFFull Text
Date of Patent:
Jun. 04, 2019

Filed:

Oct. 24, 2013

Method for producing a permanent magnet and permanent magnet

Applicant:

Volkswagen Aktiengesellschaft, Wolfsburg, DE;

Inventor:

Branislav Zlatkov, Wr. Neustadt, AT;

Assignee:

VOLKSWAGEN AKTIENGESELLSCHAFT, Wolfsburg, DE;

Attorney:

Pearl Cohen Zedek Latzer Baratz LLP

Primary Examiner:

Xiaowei Su

Int. Cl.
CPC ...
H01F 41/02 (2006.01); H01F 7/02 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01); H02K 1/27 (2006.01); B32B 15/01 (2006.01); C22C 38/00 (2006.01); B22F 1/00 (2006.01); B22F 1/02 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0266 (2013.01); B22F 1/0018 (2013.01); B22F 1/02 (2013.01); B22F 1/025 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); B32B 15/015 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); H01F 1/0552 (2013.01); H01F 1/0572 (2013.01); H01F 7/021 (2013.01); H01F 41/0273 (2013.01); H02K 1/27 (2013.01); B22F 2998/10 (2013.01); C22C 2200/02 (2013.01); C22C 2202/02 (2013.01);
Abstract

A method for producing a permanent magnet, comprising the step: (a) providing a powder of a magnetic material, (b) coating the powder particles with a coating of a diamagnetic or paramagnetic coating material, (c) compressing the coated particles to form a pressed part, (d) heat treatment to sinter the coating material at a temperature less than a temperature suitable for sintering the magnetic material, while the coating material transfers to a matrix of a diamagnetic or paramagnetic material, which embeds the particles of the magnetic material, and (e) magnetizing the magnetizable material in an external magnetic field, wherein the steps (c), (d) and (e) are carried out in any order successively or at the same time in any desired combination. The nanostructured permanent magnet that can be produced by mean of said method comprises cores of a permanently magnetic material having a mean particle diameter of no more than 1 μm and a matrix of a diamagnetic or paramagnetic material in which the cores are embedded.

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