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

YIN Shi-Long; BIAN Qing; YANG Hong-Wei; XIE Guo-Zhi; WEI Shi-Qiang

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

Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_x Nanocomposite

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 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_x manocomposite 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_x 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 Nd₉Fe_85－xB₆Mn_x nanocomposite.We consider that during the preparation,element Mn was alloyed into the main lattice of the Nd₉Fe_85－xB₆Mn_x 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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YIN Shi-Long, BIAN Qing, YANG Hong-Wei, XIE Guo-Zhi and WEI Shi-Qiang. Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_x 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 Nd₉Fe_85－xB₆Mn_x Nanocomposite[J]. Chinese Physics C, 2001, 25(S1): 12-16. shu

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Received: 1900-01-01
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通讯作者: 陈斌, bchen63@163.com

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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_x 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

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_x manocomposite 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_x 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 Nd₉Fe_85－xB₆Mn_x nanocomposite.We consider that during the preparation,element Mn was alloyed into the main lattice of the Nd₉Fe_85－xB₆Mn_x 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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Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_x Nanocomposite

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Effect of Mn Additions on the Microstructure of Nd₉Fe_85－xB₆Mn_x Nanocomposite

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