J. Mater. Sci. Technol. ›› 2009, Vol. 25 ›› Issue (05): 629-632.

• Articles • 上一篇    下一篇

Reduction of sensitivity to sintering temperature for Nd-Fe-B magnets through Zr and Nb additions

M. Yan;X.G. Cui;L.Q. Yu;T.Y. Ma   

  1. State Key Laboratory of Silicon Materials; Department of Materials Science and Engineering; Zhejiang University; Hangzhou 310027; China
  • 收稿日期:2008-08-19 修回日期:2008-11-05 出版日期:2009-09-28 发布日期:2009-10-10
  • 通讯作者: M. Yan

Reduction of Sensitivity to Sintering Temperature for Nd-Fe-B Magnets through Zr and Nb Additions

Mi Yan, Xigui Cui, Lianqing Yu, Tianyu Ma   

  1. State Key Laboratory of Silicon Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2008-08-19 Revised:2008-11-05 Online:2009-09-28 Published:2009-10-10
  • Contact: M. Yan
  • Supported by:

    the National Natural Science Foundation of China (No. 50701039)
    Program for New Century Excellent Talents in University (No. 05−0526)
    Program for Innovative Research Team in University (No. 0651)

关键词: Sintered Nd-Fe-B magnet;Magnetic properties;Consistency;Sintering temperature

Abstract:

To reduce the sensitivity of grain growth to sintering temperature for improving property consistency of sintered Nd−Fe−B magnets, combined additions of Zr and Nb were investigated. It was found that when Zr content was increased to 0.07 at. pct, abnormal grain growth was effectively hindered even when the sintering temperature reached 1100°C. With combined additions of 0.07 at. pct Zr and 0.07 at. pct Nb, the sensitivity of grain growth to sintering temperature was greatly reduced. The magnets sintered at 1100°C showed higher property consistency than the magnets containing no Zr and Nb. In addition, the magnetic properties of magnets were also improved.

Key words: Sintered Nd-Fe-B magnet, Magnetic properties, Consistency, Sintering temperature