PrAl and PrDyAl diffusion into Nd-La-Ce-Fe-B sintered magnets: Critical role of surface microstructure in the magnetic performance

Jiaying Jin,Wang Chen,Meixun Li,Xiaolian Liu,Mi Yan

Applied Surface Science（2020）

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摘要

•Coercivity approaching 15 kOe is acquired for PrAl diffusion into LaCe-40 magnet.•PrDyAl GBDP cannot further enhance coercivity whilst lowers remanence to 12.16 kG.•Anomalous behavior of PrDyAl GBDP magnet is due to particular surface microstructure.•Pr-rich shell along continuous GBs favors coercivity-remanence balance for PrAl GBDP.

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关键词

Abundant rare earth,Grain boundary diffusion,Coercivity,Microstructure

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