Microstructure and magnetic properties of NdFeB magnet prepared by spark plasma sintering

Wenjian Mo, Lanting Zhang, Aidang Shan, Lijun Cao, Jiansheng Wu, Matahiro Komuro

doi:10.1016/j.intermet.2007.05.011

Microstructure and magnetic properties of NdFeB magnet prepared by spark plasma sintering

DOI Web Site Web Site 被引用文献2件

書誌事項

公開日: 2007-11

権利情報

https://www.elsevier.com/tdm/userlicense/1.0/

DOI

10.1016/j.intermet.2007.05.011

公開者: Elsevier BV

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説明

Abstract Nd 15 Dy 1.2 Fe bal Al 0.8 B 6 magnet was prepared by spark plasma sintering (SPS) technique. Sintering between 810 and 830 °C and consequent tempering result in relatively high magnetic properties and sintering density, which are comparable to the conventionally sintered ones. Further increase of sintering temperature gains a slight increase in sintering density and decrease in magnetic properties. Grain size of NdFeB prepared by SPS is fine and uniform, which is much smaller than that of conventionally sintered ones. Continuous thin film of the Nd-rich phase is formed along the grain boundary and the density of magnet is increased through tempering, which is the main reason for improving the magnetic properties. Furthermore, TEM observations indicate a conversion of crystal structure of the Nd-rich phase at triple junction site after tempering.