DEM simulation of the single-directional pressed and double-directional pressed Nd-Fe-B compacts

• Published in: 2023 IEEE International Magnetic Conference - Short Papers (INTERMAG Short Papers) pp. 1 - 2
• Main Authors: Zhu, Kunyuan, Bao, Xiaoqian, Li, Jiheng, Guan, Shengen, Gao, Xuexu
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-05-2023
• Subjects: discrete element method (DEM); Finite element analysis; Force; Magnetic fields; magnetic pressing process; Nd-Fe-B sintered magnets; particle orientation; Pressing
• DOI: 10.1109/INTERMAGShortPapers58606.2023.10228520

In this study, the differences between single-directional pressed (SDP) and double-directional pressed (DDP) Nd-Fe-B compacts were investigated by using discrete element method (DEM) simulation, especially the difference in alignment degree distribution of compacts. The results show that the DDP compact has a higher alignment degree than the SDP compact since the difference in movement distance between particles in different sections of the DDP compact was smaller during the pressing process. And the distribution of the alignment degree of the DDP compact is more uniform than that of the SDP compact. In both of the DDP and SDP compacts, the central section has a higher alignment degree in the direction of the applied magnetic field, and particles close to the punch had a lower alignment degree because they traveled a longer distance than middle particles and were subjected to a larger compressive force.