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Effect of Temperature on the Plastic Deformability of Gas Atomized NdFeB Anisotropic Magnets

Cho Ju-Young, Choa Yong-Ho, Nam Sun-Woo, Rasheed Mohammad Zarar, Kim Taek-Soo

Archives of Metallurgy and Materials

2020

Vol. 65, iss. 4

1293--1296

NdFeB anisotropic sintered permanent magnets are typically fabricated by strip casting or melt spinning. In this study, the plastic deformability of an NdFeB alloy was investigated to study the possibility of fabricating anisotropic sintered magnets using gas atomized powders. The results show that the stoichiometric composition Nd12Fe82B6 softens at high temperatures. The aspect ratio and orientation factor of Nd12Fe82B6 billets after plastic deformation were found to increase with increasing plastic deformation temperature, particularly above 800°C. This confirms that softening at high temperatures can lead to plastic deformation of Nd2Fe14B hard magnetic phases.