Development of Nd-Fe-B anisotropic bonded magnet with 27 MGOe

被引：46

作者：

Hamada, N ^{[1
]}

Mishima, C ^{[1
]}

Mitarai, H ^{[1
]}

Honkura, Y ^{[1
]}

机构：

[1] Aichi Steel Corp, Tokai, Aichi 4768666, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2003年 / 39卷 / 05期

关键词：

anisotropic bonded magnet; d-HDDR treatment; dysprosium; NdFeB;

D O I：

10.1109/TMAG.2003.815757

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The maximum energy product of bonded magnets is advancing every year. The highest maximum energy product of any bonded magnet achieved is 25 MGOe (200 kJ/m(3)) in the Nd-Fe-B system by d-HDDR treatment. There is a great demand for even higher energy bonded magnets with the desire for smaller, more efficient electric motors. Bonded magnets made from d-HDDR treated anisotropic magnet powder have low squareness due to low squareness of the powder. The authors developed a method to increase squareness; of d-HDDR powder, and succeeded in developing the world's highest energy bonded magnet with 26.6 MGOe (213 kJ/m(3)). This was achieved through Dy-diffusion treatment followed by d-HDDR treatment, as well as an increase in the density of the bonded magnet. This magnet has little aging loss after being held at 393 K for 878 h.

引用

页码：2953 / 2955

页数：3

共 11 条

[1] Controlling the properties of high energy density permanent magnetic materials by different processing routes [J].