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

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.