Details

Autor(en) / Beteiligte

• Wang, Zexuan
• Sasaki, Taisuke
• Une, Yasuhiro
• Ohkubo, Tadakatsu
• Hono, Kazuhiro

Titel

Achieving 2.8 T coercivity in Nd-Fe-B sintered magnets subjected to DyCu and PrCu grain boundary diffusion process

Ist Teil von

• 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers), 2023, p.1-2

Ort / Verlag

IEEE

Erscheinungsjahr

2023

Link zum Volltext

Quelle

IEEE Xplore

Beschreibungen/Notizen

• There has been a concern about the over-consumption of scarce and expensive heavy rare-earth elements (HREs), such as Dy and Tb, in achieving high coercivity in Nd-Fe-B magnets. This work reports an approach to achieve a high coercivity of 2.8 T by sequentially diffusing Dy 70 Cu 30 and Pr 68 Cu 32 eutectic alloys in fine-grained sintered magnets fabricated by a press-less process. The coercivity of 2.8 T was achieved for its low Dy content of only 0.9 wt.%. The Pr 68 Cu 32 diffusion facilitated the infiltration of Dy towards the center of the magnets, resulting in uniform Dy-rich shell formation in the whole sample. Such a unique shell structure increased the anisotropy field of the shell to realize the 2.8 T coercivity.