东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (6): 853-856.DOI: -

• 论著 • 上一篇    下一篇

NdFeCoBZrGa合金各向异性磁粉的制备

尤俊华;连法增;王继杰;裴文利;   

  1. 东北大学材料各向异性与织构教育部重点实验室;东北大学材料各向异性与织构教育部重点实验室;沈阳航空工业学院材料工程系;东北大学材料各向异性与织构教育部重点实验室 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110034;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-06-15 发布日期:2013-06-22
  • 通讯作者: You, J.-H.
  • 作者简介:-
  • 基金资助:
    国家“十五”科技攻关项目(2004BA310A51-1)

Preparation for NdFeCoBZrGa alloys anisotropic magnetic powder

You, Jun-Hua (1); Lian, Fa-Zeng (1); Wang, Ji-Jie (2); Pei, Wen-Li (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Northeastern University, Shenyang 110004, China; (2) Department of Materials, Shenyang Institute of Aeronautical Engineering, Shenyang 110034, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-06-15 Published:2013-06-22
  • Contact: You, J.-H.
  • About author:-
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摘要： HDDR(氢化-歧化-脱氢-再结合)工艺是一种用于生产各向异性Nd2Fe14B基磁粉的有效方法.主要研究了真空HDDR工艺(即合金在真空中以较快速率加热到820℃左右,然后在一定的氢气压力下吸氢歧化)及添加合金元素Ga对Nd13Fe64.4-yCo16B6.5Zr0.1Gay(y=0.1,0.3,0.5,1.0)合金磁性能的影响规律.结果表明,真空HDDR工艺的吸氢歧化阶段是促使材料产生磁各向异性的关键,脱氢阶段采用低真空高温制度是材料获得高各向异性的保证;合金元素Ga有助于细化主相晶粒,提高材料的综合磁性能,其最佳原子分数添加量为0.5%;成分为Nd13Fe63.9Co16B6.5Zr0.1...

关键词: Nd2Fe14B, 真空HDDR, 磁粉, 晶粒尺寸

Abstract: HDDR (hydrogenation-disproportionation-desorption-recombination) process is an effective means by which the anisotropic Nd2Fe14B-base magnetic powder can be prepared. vacuum HDDR process, i.e. the alloy is heated to the temperature about 820°C in vacuum and then HD reactions occur under the certain hydrogen press are with the addition of the alloying element Ga affects the magnetic properties of Nd13Fe64.4-yCo16 B6.5Zr0.1Gay (y=0.1, 0.3, 0.5, 1.0) alloy was studied. The results indicated that in the vacuum HDDR process, the HD steps are the key to spur the alloy on to anisotropy, and applying the low-vacuum high-temperature schedule to the desorption step will make sure that the alloy is anisotropic. The alloying element Ga contributes to refining the grains of main phase and improving the comprehensive magnetic properties of the alloy, of which the best atom fraction is 0.5%. Treated by the vacuum HDDR process, the Nd13Fe63.9Co16 B6.5Zr0.1Ga0.5 alloy provides its best magnetic properties, i.e. iHc=1018 kA·m-1, Br=1.32 T, (BH)max=118.6 kJ·m-3 and DOA=0.787.

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