中国物理B ›› 2015, Vol. 24 ›› Issue (9): 97505-097505.doi: 10.1088/1674-1056/24/9/097505

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Influence of RE-rich phase distribution in initial alloy on anisotropy of HDDR powders

蔡岭文a b, 郭帅a b, 丁广飞a b, 陈仁杰a b, 刘剑a b, 李东c, 闫阿儒a b   

  1. a Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    b Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    c University of Dayton, Dayton, OH 45469, USA
  • 收稿日期:2015-01-09 修回日期:2015-04-22 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51101167), the Ningbo Natural Science Foundation, China (Grant No. 2013A610075), the Ningbo Science and Technology Project, China (Grant No. 2013B10004), the Program of International Science and Technology Cooperation of China (Grant No. 2010DFB53770), the China Postdoctoral Science Foundation (Grant No. 2012M520943), the State Key Program of the National Natural Science Foundation of China (Grant No. 2011AA03A401), and the National Key Technologies R&D Program of China (Grant No. 2012BAE01B03).

Influence of RE-rich phase distribution in initial alloy on anisotropy of HDDR powders

Cai Ling-Wen (蔡岭文)a b, Guo Shuai (郭帅)a b, Ding Guang-Fei (丁广飞)a b, Chen Ren-Jie (陈仁杰)a b, Liu Jian (刘剑)a b, Lee Don (李东)c, Yan A-Ru (闫阿儒)a b   

  1. a Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    b Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
    c University of Dayton, Dayton, OH 45469, USA
  • Received:2015-01-09 Revised:2015-04-22 Online:2015-09-05 Published:2015-09-05
  • Contact: Yan A-Ru E-mail:aruyan@nimte.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51101167), the Ningbo Natural Science Foundation, China (Grant No. 2013A610075), the Ningbo Science and Technology Project, China (Grant No. 2013B10004), the Program of International Science and Technology Cooperation of China (Grant No. 2010DFB53770), the China Postdoctoral Science Foundation (Grant No. 2012M520943), the State Key Program of the National Natural Science Foundation of China (Grant No. 2011AA03A401), and the National Key Technologies R&D Program of China (Grant No. 2012BAE01B03).

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摘要： The influence of the RE-rich phase distribution in the precursor alloys on the anisotropy of the hydrogenation disproportionation desorption recombination (HDDR) processed powders is investigated. The homogenized ingot alloy and the as-cast strip casting (SC) alloy with a uniform RE-rich grain boundary phase lead to high anisotropy of the refined powders, acquiring degrees of alignment (DOA) of 0.62 and 0.54, respectively. The RE-rich phase aggregation results in a deteriorated DOA of the powders due to the drastic disproportionation rate, while a thin and uniform RE-rich phase distribution is beneficial for DOA. A reaction model of the initial particle microstructure is proposed for optimizing the HDDR powder anisotropy.

关键词: hydrogenation disproportionation desorption recombination (HDDR), anisotropy, RE-rich phase, initial microstructure

Abstract: The influence of the RE-rich phase distribution in the precursor alloys on the anisotropy of the hydrogenation disproportionation desorption recombination (HDDR) processed powders is investigated. The homogenized ingot alloy and the as-cast strip casting (SC) alloy with a uniform RE-rich grain boundary phase lead to high anisotropy of the refined powders, acquiring degrees of alignment (DOA) of 0.62 and 0.54, respectively. The RE-rich phase aggregation results in a deteriorated DOA of the powders due to the drastic disproportionation rate, while a thin and uniform RE-rich phase distribution is beneficial for DOA. A reaction model of the initial particle microstructure is proposed for optimizing the HDDR powder anisotropy.

Key words: hydrogenation disproportionation desorption recombination (HDDR), anisotropy, RE-rich phase, initial microstructure

中图分类号:  (Permanent magnets)

  • 75.50.Ww
75.50.Vv (High coercivity materials)