| Effects of milling and crystallization conditions on microstructure of Nd2Fe14B/α-Fe powder |
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| 引用本文： | 王迎,王尔德.Effects of milling and crystallization conditions on microstructure of Nd2Fe14B/α-Fe powder[J].中国有色金属学会会刊,2007,17(1):138-142. |
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| 作者姓名： | 王迎 王尔德 |
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| 作者单位： | School of Materials Science and Engineering Harbin Institute of Technology，School of Materials Science and Engineering，Harbin Institute of Technology，Harbin 150001，China，Harbin 150001，China |
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| 摘 要： | Effects of milling and crystallization conditions on microstructure,such as amorphous phase and nanocrystalline phase, were investigated by X-ray diffractometry(XRD),differential scanning calorimetry(DSC),and transmission electron microscopy (TEM),respectively.The results show that nanocomposite Nd2Fe14B/α-Fe powder can be prepared by mechanical milling in argon atmosphere and a subsequent vacuum annealing treatment.The grain sizes of both Nd2Fe14B andα-Fe phase decrease drastically with increasing milling time.After milling for 5 h,the as-milled material consists ofα-Fe nanocomposite phases with the grain size of 10 nm,and some amorphous phases,which can be turned into Nd2Fe14B/α-Fe nanocomposite phases by the subsequent annealing treatment.Milling energy of mechanical milling after 5 h by theoretical calculation is 6 154.25 kJ/g.
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| 关 键 词： | mechanical milling crystallization treatment Nd2Fe14B/α-Fe grain size milling energy |
| 收稿时间： | 2006-03-28 |
| 修稿时间： | 2006-10-17 |
Effects of milling and crystallization conditions on microstructure of Nd2Fe14B/α-Fe powder |
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| WANG Ying,WANG Er-de,.Effects of milling and crystallization conditions on microstructure of Nd2Fe14B/α-Fe powder[J].Transactions of Nonferrous Metals Society of China,2007,17(1):138-142. |
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| Authors: | WANG Ying WANG Er-de |
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| Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Effects of milling and crystallization conditions on microstructure, such as amorphous phase and nanocrystalline phase, were investigated by X-ray diffractometry(XRD), differential scanning calorimetry(DSC), and transmission electron microscopy (TEM), respectively. The results show that nanocomposite Nd2Fe14B/α-Fe powder can be prepared by mechanical milling in argon atmosphere and a subsequent vacuum annealing treatment. The grain sizes of both Nd2Fe14B and α-Fe phase decrease drastically with increasing milling time. After milling for 5 h, the as-milled material consists of α-Fe nanocomposite phases with the grain size of 10 nm, and some amorphous phases, which can be turned into Nd2Fe14B/α-Fe nanocomposite phases by the subsequent annealing treatment. Milling energy of mechanical milling after 5 h by theoretical calculation is 6 154.25 kJ/g. |
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