ハード材料
Nd-Fe-B-Cu異方性粉末の樹脂ボンド磁石の特性
1992 年 16 巻 2 号 p. 139-142
詳細
1992 年 16 巻 2 号 p. 139-142
Anisotropic Nd-Fe-B-Cu powder was fabricated by grinding melt-spun and subsequently hot-rolled materials. We prepared two types of powder with different particle shapes: one in anisotropic shape and the other in a flat shape with c-axis perpendicu. lar to the flat face. Perpendicular-field pressing experiments show that the isotropic particle is better aligned in the bonded magnet than the flat particle. Radial-field pressing using the isotropic particle gives a high (BH)max, value up to 16 MGOe for bonded magnets with density of 6.0 g/cm3.
The Nd-Fe-B-Cu powder has been found to be well aligned in a relatively low magnetic field. This fact is beneficial for fabricating ring magnets with smaller radius or larger height.
