Low-cost rare earth magnet and corresponding manufacturing method thereof

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United States of America Patent

PATENT NO 12057263
APP PUB NO 20230102274A1
SERIAL NO

17951137

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Abstract

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The disclosure relates to the technical field of sintered type NdFeB permanent magnets, in particular to a low-cost rare earth magnet and manufacturing method. There is provided a method of preparing a high-coercivity sintered NdFeB magnet including cerium comprising the following steps: (S1) providing alloy flakes composed of RxT(1-x-y-z)ByMz; (S2) mixing the alloy flakes, a low melting point powder, and a lubricant, then subjecting the mixture to a hydrogen embrittlement process followed in this order by pulverizing the process product to an alloy powder by jet milling, magnetic field orientation molding of the allow powder to obtain a blank, sintering and aging treatment the blank; (S3) coating a film composed of a diffusion source of formula R1xR2yHzM1-x-y-z on the sintered NdFeB magnet; and (S4) performing a diffusion heat treatment, followed by aging the sintered NdFeB magnet to obtain the low-cost rare earth magnet.

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Patent Owner(s)

Patent OwnerAddress
YANTAI DONGXING MAGNETIC MATERIALS INC265500 YANTAI CITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ding, Kaihong Shandong, CN 31 7
Peng, Zhongjie Shandong, CN 44 17
Wang, Chuanshen Shandong, CN 16 6
Yang, Kunkun Shandong, CN 25 11

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