New sintered high temperature Sm-Co based permanent magnet materials

被引：37

作者：

Liu, S ^{[1
]}

Yang, J

Doyle, G

Kuhl, GE

Chen, C

Walmer, M

Simon, G

机构：

[1] Univ Dayton, Magnet Lab, Dayton, OH 45460 USA

[2] Electron Energy Corp, Landisville, PA 17538 USA

[3] USAF, Res Lab, Mat Directorate, Wright Patterson AFB, OH 45433 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 05期

关键词：

high temperature applications; rare earth permanent magnets; Sm-Co based permanent magnets; temperature coefficient of coercivity;

D O I：

10.1109/20.800513

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：

New sintered Sm-Co based permanent magnet materials have been developed to meet the high-temperature (greater than or equal to 400 degrees C) application requirement of advanced power systems. A magnet of Sm(CobalFe0.09Cu0.09Zr0.03)(7.69) shows an intrinsic coercivity (H-M(c)) approaching 13 kOe and an energy product of 14 MGOe at 400 degrees C. Its second-quadrant induction demagnetization curve is a straight line at temperatures to 500 degrees C. Magnets with improved temperature coefficient of H-M(c) have been obtained by reducing the Fe content and increasing the Sm content. An abnormal and complex temperature dependence of H-M(c) was observed in sintered Sm(CobalFe0.04Cu0.09Zr0.02)(7.26) Upon heating, the H-M(c) first reached a minimum of 4.4 kOe at 150 degrees C and then gradually increased to a maximum of 7.5 kOe at 500 degrees C.

引用

页码：3325 / 3327

页数：3

共 10 条

[1] Sm2(Co,Fe,Cu,Zr)17 magnets for use at temperature ≥400 °C [J].