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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 12494322 B1

PDFFull Text
Date of Patent:
Dec. 09, 2025

Filed:

Jun. 23, 2025

Preparation method for anisotropic ndfeβ/α-fe bulk nanocrystalline composite permanent magnet material

Applicant:

Yanshan University, Qinhuangdao, CN;

Inventors:

Xiaohong Li, Qinhuangdao, CN;

Jinyi Wang, Qinhuangdao, CN;

Jianyuan Kou, Qinhuangdao, CN;

Peng Chen, Qinhuangdao, CN;

Yan Zheng, Qinhuangdao, CN;

Li Lou, Qinhuangdao, CN;

Xiangyi Zhang, Qinhuangdao, CN;

Assignee:

Yanshan University, Qinhuangdao, CN;

Attorney:

Nitin Kaushik

Primary Examiner:

Anthony M Liang

Int. Cl.
CPC ...
H01F 41/02 (2006.01); B22F 3/02 (2006.01); B22F 3/18 (2006.01); B22F 9/00 (2006.01); B22F 9/04 (2006.01); C22C 33/04 (2006.01); C22C 38/00 (2006.01); C22C 38/16 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0266 (2013.01); B22F 3/02 (2013.01); B22F 3/18 (2013.01); B22F 9/008 (2013.01); B22F 9/04 (2013.01); C22C 33/04 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/16 (2013.01); H01F 1/057 (2013.01); B22F 2009/043 (2013.01); B22F 2301/355 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01);
Abstract

Disclosed in the present invention is a preparation method for an anisotropic NdFeB/α-Fe bulk nanocrystalline composite permanent magnet material. The preparation method comprises the following steps: preparing a master alloy; crushing the master alloy into bulks, and, by means of a melt rapid quenching method, preparing amorphous ribbons; grinding the amorphous ribbons to obtain amorphous powder; cold-pressing the powder into bulks; and placing the bulks into a stainless steel mold, and heating and then rolling same, the stainless steel mold being of a plate-shaped structure, and a chamber for accommodating the bulks being formed in the stainless steel mold along the thickness direction thereof. The present invention presses the NdFeB amorphous powder into bulks, embeds same in the stainless steel mold, and performs rolling at a temperature below a crystallization temperature, so as to achieve high-temperature amorphous material crystallization.

Find Patent Forward Citations

Li, Xiaohong. (2025). Preparation method for anisotropic ndfeβ/α-fe bulk nanocrystalline composite permanent magnet material (U.S. Patent No. 12494322). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12494322

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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