Invention Grant
- Patent Title: Grain boundary diffusion process for rare-earth magnets
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Application No.: US14049443Application Date: 2013-10-09
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Publication No.: US09786419B2Publication Date: 2017-10-10
- Inventor: Feng Liang , C Bing Rong , Michael W. Degner
- Applicant: Ford Global Technologies, LLC
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Brooks Kushman P.C.
- Agent David Kelley
- Main IPC: H01F1/055
- IPC: H01F1/055 ; B22F3/12 ; B22F5/00 ; H01F1/053 ; H01F41/02 ; H01F1/057 ; B22F7/06

Abstract:
In at least one embodiment, a single sintered magnet is provided having a concentration profile of heavy rare-earth (HRE) elements within a continuously sintered rare-earth (RE) magnet bulk. The concentration profile may include at least one local maximum of HRE element concentration within the bulk such that a coercivity profile of the magnet has at least one local maximum within the bulk. The magnet may be formed by introducing alternating layers of an HRE containing material and a magnetic powder into a mold, pressing the layers into a green compact, and sintering the green compact to form a single, unitary magnet.
Public/Granted literature
- US20150099104A1 Grain Boundary Diffusion Process For Rare-Earth Magnets Public/Granted day:2015-04-09
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