Grain boundary diffusion process for rare-earth magnets

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United States of America Patent

PATENT NO 9786419
SERIAL NO

14049443

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Abstract

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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.

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Patent Owner(s)

  • FORD GLOBAL TECHNOLOGIES, LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Degner, Michael W Novi, US 304 2776
Liang, Feng Troy, US 376 3176
Rong, C Bing Canton, US 10 30

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