Chinese Physics C > 2001, Vol. 25 > Issue(S1): 12-16

Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_xNanocomposite

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

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Abstract：
The long-rang and local structures of the Nd ₉Fe _85－xB ₆Mn _x(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 Nd ₉Fe _85－xB ₆Mn _xmanocomposite were strongly correlated with the addition of Mn atoms.Following the increase of Mn content,the long-range and local orders of the Nd ₉Fe _85－xB ₆Mn _xnanocomposite increase,and a soft magnetic phase of α-Fe and a hard magnetic phase of Nd ₂Fe ₁₄B 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 Nd ₉Fe _85－xB ₆Mn _xnanocomposite.We consider that during the preparation,element Mn was alloyed into the main lattice of the Nd ₉Fe _85－xB ₆Mn _xnanocomposite 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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YIN Shi-Long, BIAN Qing, YANG Hong-Wei, XIE Guo-Zhi and WEI Shi-Qiang. Effect of Mn Additions on the Microstructure of Nd ₉Fe _85－xB ₆Mn _xNanocomposite[J]. Chinese Physics C, 2001, 25(S1): 12-16.

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Received: 1900-01-01
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_xNanocomposite

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

Received Date:1900-01-01

Accepted Date:1900-01-01

Available Online:2001-06-22

Abstract:The long-rang and local structures of the Nd₉Fe_85－xB₆Mn_x(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 Nd₉Fe_85－xB₆Mn_xmanocomposite were strongly correlated with the addition of Mn atoms.Following the increase of Mn content,the long-range and local orders of the Nd₉Fe_85－xB₆Mn_xnanocomposite 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 Nd₉Fe_85－xB₆Mn_xnanocomposite.We consider that during the preparation,element Mn was alloyed into the main lattice of the Nd₉Fe_85－xB₆Mn_xnanocomposite 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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Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_xNanocomposite

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