东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (10): 931-934.DOI: -

• 论著 • 上一篇    下一篇

HDDR工艺对Nd_2Fe_(14)B基磁粉磁性能的影响

付猛;连法增;王继杰;杨洪才   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-10-15 发布日期:2013-06-24
  • 通讯作者: Fu, M.
  • 作者简介:-
  • 基金资助:
    国家"十五"重点科技攻关项目(2002B A315A 6 5)·

Effect of HDDR process on properties of Nd2Fe14B-Based Magnetic Powders

Fu, Meng (1); Lian, Fa-Zeng (1); Wang, Ji-Jie (1); Yang, Hong-Cai (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-10-15 Published:2013-06-24
  • Contact: Fu, M.
  • About author:-
  • Supported by:
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摘要： 氢化 歧化 脱氢 再复合(简称HDDR)工艺是生产Nd2Fe14B基永磁粉的一种特殊方法·研究了HDDR工艺制造高性能Nd Fe B磁粉时,不同HD温度和不同DR温度对磁粉性能的影响规律·利用XRD方法分析了不同工艺条件下样品的相组成·结果发现,Nd Fe B磁粉的磁性能对HD温度和DR温度敏感,合金元素Ga,Al的添加可改善磁粉的磁性能·有害相α Fe的消除可提高磁粉的剩磁,但均匀化处理不能将α Fe完全消除·HD过程中,主相Nd2Fe14B分解为NdH2,α Fe和Fe2B三相,DR过程后,主相晶粒得到细化·计算表明,主相晶粒尺寸大约为0 28μm·

关键词: NdFeB, HDDR工艺, 磁粉, 矫顽力, 剩磁, α-Fe相, 晶粒尺寸

Abstract: The HDDR (Hydrogenation-disproportionation-desorption-recombination) is a special process to produce Nd2Fe14B -based permanent magnet powder. The effects of HD and/or DR temperature on the properties of high performance Nd-Fe-B magnet powders produced by HDDR process were investigated, with X-ray diffraction (XRD) used to analyze the phase component of the alloy in various treating conditions. The results show that the magnetic properties of the Nd-Fe-B powders are sensitive to either HD or DR temperature and adding the alloying elements Ga and Al into them can improve their magnetic properties. Although the remanence of magnetic powders will be improved by way of eliminating the harmful α-Fe phase, the phase can not be eliminated completely by homogenizing treatment. The major phase Nd2Fe14B is decomposed into three phases, i.e., α-Fe, NdH2 and Fe2B, during HD stage, then the major α-phase grain size becomes finer after DR stage, about 0.28 μm as calculated.

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