Research of warm compaction technology on nylon bonded Nd-Fe-B magnets

doi:10.1016/S1006-7191(08)60086-1

Abstract

Abstract:

Warm compaction and room temperature compaction were applied to prepare bonded Nd-Fe-B magnets. Warm compaction was proved to be a good way to improve the density, magnetic and mechanical properties of bonded magnets. The results indicated that the density of magnet was determined by the compaction pressure and warm compaction temperature, while the thermosetting temperature could hardly affect the density of magnet. The mechanical properties of magnets were the best when the thermosetting temperature was 200℃. The Br, Hcb and (BH)max of warm compaction magnet were higher than that of room compaction. When the warm compaction temperature and thermosetting temperature were invariable, the density of magnet increased with the increase of compaction pressure, which resulted in the increase of Br, Hcb and (BH)max of magnet and the decrease of Hcj of magnet. When the warm compaction temperature and compaction pressure were invariable, the magnetic properties of magnets decreased with the increase of thermosetting temperature. The magnetic properties of warm compaction molding magnets were better than that of injection molding magnets.

Key words: Bonded Nd-Fe-B magnets, Warm compaction molding, Magnetic properties, Mechanical properties

Xiuhai ZHANG,Weihao XIONG,Dameng YE,Jun QU,Zhenhua YAO. Research of warm compaction technology on nylon bonded Nd-Fe-B magnets[J]. Acta Metallurgica Sinica (English Letters), 2009, 22(3): 174-180.

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