Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Microstructure and Magnetic Properties of $Nd_2Fe_{14}B/{\alpha}-Fe$ Nanocomposite Prepared by HDDR Combined with Mechanical Milling

  • Hu, Lianxi (School of Mater. Sci. & Eng., Harbin Institute of Technology) ;
  • Wang, Erde (School of Mater. Sci. & Eng., Harbin Institute of Technology) ;
  • Guo, Bin (School of Mater. Sci. & Eng., Harbin Institute of Technology) ;
  • Shi, Gang (School of Mater. Sci. & Eng., Harbin Institute of Technology)
  • Published : 2006.09.24
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Abstract

[ $Nd_2Fe_{14}B/{\alpha}-Fe$ ] nanocomposite powders with a nominal composition of $Nd_{12}Fe_{82}B_6$ were prepared by HDDR combined with mechanical milling. The microstructure was studied by Mossbauer spectrometry and TEM. The magnetic properties were investigated by VSM using bonded magnet samples. The results showed that the annealing temperature had significant influence on both the recombination kinetics and the grain size of the $Nd_2Fe_{14}B$ and ${\alpha}-Fe$ phases, and the bonded magnets presented the best magnetic properties when the nanocomposite powders were prepared by annealing at $760^{\circ}C$ for 30 min.

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