Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (5): 351-356.DOI: 10.11890/1006-7191-105-351

• 研究论文 • 上一篇    下一篇

用机械合金化制备的铁基微粉的结构及磁特性

T.D. zhou   

  1. Xihua University
  • 收稿日期:2010-05-12 修回日期:2010-07-22 出版日期:2010-10-25 发布日期:2010-10-14
  • 通讯作者: T.D. zhou

Structure and magnetic properties of Fe-based powders prepared by mechanical alloying

Tingdong ZHOU1,2, Zhengyun WANG1, Jiangkang TANG1, Haipeng LU2   

  1. 1 Key Laboratory of Special Material and Preparing Technology, Xihua University, Chengdu 610039, China
    2 State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2010-05-12 Revised:2010-07-22 Online:2010-10-25 Published:2010-10-14
  • Contact: Tingdong ZHOU

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摘要： 用机械合金化方法，分别球磨20h，40h，60h和80h，制备出FeSiAlCr合金微粉。用SEM研究了微粉的形貌特征，用XRD分析了不同时间球磨后微粉的显微结构。测试了微粉在0.5~18GHz频段内的复数介电常数和复数磁导率，分析了四种微粉的吸波性能。结果表明，球磨80h后的微粉的粒径小于2μm；Si、Al原子固溶到Fe的晶格中，Cr原子与Fe原子形成合金。80h球磨的微粉的反射率在频率为4.3GHz处可达到的吸收峰值为-11.3dB，并且在16.5GHz处还有一吸收峰值，达到-6dB。

关键词: FeSiAlCr合金, 固溶体, 电磁参数, 反射率, 机械合金化

Abstract: FeSiAlCr alloy powders were prepared by mechanical alloying, the milling time were 20 h, 40 h, 60 h and 80~h, respectively. Powders morphology was studied by SEM. Microstructure of powders milled for various times were analyzed by XRD. The complex permittivity and complex permeability of four powders were tested in the frequency range from 0.5 to 18 GHz, and their microwave absorption properties were analyzed. It was found that the particle size of powders milled for 80~h was less than 2μm. Silicon and aluminum atoms were dissolved into the crystal lattice of iron, and chromium atoms can form alloy with iron atoms. The minimum peak value of reflectivity can reach to -11.3 dB at the frequency of 4.3 GHz for 80 h milling powders, and the other one was -6 dB at 16.5 GHz.

Key words: FeSiAlCr alloy, Solid solution, Electromagnetic parameter, Reflectivity, Mechanical alloying