Effect of Mn Additions on the Microstructure of Nd9Fe85-xB6Mnx Nanocomposite

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YIN Shi-Long, BIAN Qing, YANG Hong-Wei, XIE Guo-Zhi and WEI Shi-Qiang. Effect of Mn Additions on the Microstructure of Nd9Fe85-xB6Mnx Nanocomposite[J]. Chinese Physics C, 2001, 25(S1): 12-16.
YIN Shi-Long, BIAN Qing, YANG Hong-Wei, XIE Guo-Zhi and WEI Shi-Qiang. Effect of Mn Additions on the Microstructure of Nd9Fe85-xB6Mnx Nanocomposite[J]. Chinese Physics C, 2001, 25(S1): 12-16. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Effect of Mn Additions on the Microstructure of Nd9Fe85-xB6Mnx Nanocomposite

    Corresponding author: YIN Shi-Long,
  • Dept.of Math.& Phys,Univ.Hohai,Nanjing 210024,China2 Institute of Science,PLAUST,Nanjing 210016,China3 NSRL,University of Science and Technology of China,Hefei 230029,China4 Dept.of Phys.,Nanjing Univ.,Nanjing 210093,China

Abstract: The long-rang and local structures of the Nd9Fe85-xB6Mnx(x=0.5,1.0)nanocomposite produced at melt spinning speed of 20m/s have been investigated by X-ray absorption fine structure(XAFS) and X-ray diffraction (XRD).The crystallized samples were annealed at temperatures 700°C for 5 minutes with a high heating rate.The results show that in the initial samples,the structures of the Nd9Fe85-xB6Mnx manocomposite were strongly correlated with the addition of Mn atoms.Following the increase of Mn content,the long-range and local orders of the Nd9Fe85-xB6Mnx nanocomposite increase,and a soft magnetic phase of α-Fe and a hard magnetic phase of Nd2Fe14B were formed at the addition of 1% Mn.However,the addition of element Mn can not lead to the generation of new phases or the deeper crystallization for the Nd9Fe85-xB6Mnx nanocomposite.We consider that during the preparation,element Mn was alloyed into the main lattice of the Nd9Fe85-xB6Mnx nanocomposite with a metastable structure; through annealing,the Mn atoms were separated from the initial main lattice to the borders of crystalline grain.

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