Invention Grant
- Patent Title: Gradient Nd—Fe—B magnet and a method of production
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Application No.: US16459448Application Date: 2019-07-01
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Publication No.: US12080478B2Publication Date: 2024-09-03
- Inventor: Kunkun Yang , Zhongjie Peng , Chuanshen Wang
- Applicant: Yantai Shougang Magnetic Materials, Inc.
- Applicant Address: CN Yantai
- Assignee: YANTAI SHOUGANG MAGNETIC MATERIALS INC.
- Current Assignee: YANTAI SHOUGANG MAGNETIC MATERIALS INC.
- Current Assignee Address: CN Yantai
- Agency: Dickinson Wright PLLC
- Priority: CN 1810694252.7 2018.06.29
- Main IPC: H01F41/02
- IPC: H01F41/02 ; B22F3/24 ; H01F1/055 ; H01F1/057 ; H01F7/02

Abstract:
A gradient Nd—Fe—B magnet includes an Nd—Fe—B magnet block extending along a magnetization direction and having a plurality of surfaces perpendicular to the magnetization direction. A first film, is disposed on one of the surfaces. A second film is disposed on another one of the surfaces, opposite of the one of the surfaces. The first film and the second film are diffused into the Nd—Fe—B magnet block dividing the Nd—Fe—B magnet block into an edge region, a transition region, and a central region along a plane perpendicular to the magnetization direction wherein the edge region has a coercivity that remains constant in a direction perpendicular to the magnetization direction, and the coercivity, along said magnetization direction, gradually decreases from the one of the surfaces and the another one of the surfaces towards a point located therebetween. A method of making the gradient Nd—Fe—B magnet is disclosed herein.
Public/Granted literature
- US20200005996A1 GRADIENT ND-FE-B MAGNET AND A METHOD OF PRODUCTION Public/Granted day:2020-01-02
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