| Microstructure of explosively compacted Nd-Fe-B magnet by TEM |
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| 引用本文： | 敖琪 刘薇 曹力军 吴建生. Microstructure of explosively compacted Nd-Fe-B magnet by TEM[J]. 中国有色金属学会会刊, 2005, 15(2): 468-472 |
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| 作者姓名： | 敖琪 刘薇 曹力军 吴建生 |
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| 作者单位： | KeyLaboratoryforHighTemperatureMaterialsandTests,MinistryofEducation,ShanghaiJiaotongUniversity,Shanghai200030,China |
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| 基金项目： | 国家自然科学基金，上海市自然科学基金 |
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| 摘 要： | The microstructure of an explosively compacted Nd-Fe-B permanent magnet(Nd-Fe-B) was investigated by means of TEM and XRD. It is shown that there are three kinds of phases: Nd2 Fe14 B matrix phase, O-rich phases and Nd-rich phase with different structures and compositions in the magnet. The hard magnetic phase Nd2Fe14 B is tetragonal, which lattice parameters are determined to be a=0.88 nm and c=1.22 nm. The O-rich phase locates at the grain boundaries and the triple junctions has fcc structure whose lattice parameter is a=0. 559 nm. A dislocation is observed in this phase. It is also found that a large number of the block-shaped Nd-rich phases with hcp structure are embedded in the Nd2 Fe14 B matrix or at grain boundary. Their lattice parameters are determined to be a= 0. 395 nm and c=0. 628 nm.
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| 关 键 词： | 边界相 微结构 钕-铁-硼永磁材料 爆炸压实工艺 |
Microstructure of explosively compacted Nd-Fe-B magnet by TEM |
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| AO Qi,LIU Wei,CAO Li-jun,WU Jian-sheng. Microstructure of explosively compacted Nd-Fe-B magnet by TEM[J]. Transactions of Nonferrous Metals Society of China, 2005, 15(2): 468-472 |
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| Authors: | AO Qi LIU Wei CAO Li-jun WU Jian-sheng |
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| Abstract: | The microstructure of an explosively compacted Nd-Fe-B permanent magnet(Nd-Fe-B) was investigated by means of TEM and XRD. It is shown that there are three kinds of phases: Nd2 Fe14 B matrix phase, O-rich phases and Nd-rich phase with different structures and compositions in the magnet. The hard magnetic phase Nd2 Fe14 B is tetragonal, which lattice parameters are determined to be a=0. 88 nm and c= 1.22 nm. The O-rich phase locates at the grain boundaries and the triple junctions has fcc structure whose lattice parameter is a=0. 559 nm. A dislocation is observed in this phase. It is also found that a large number of the block-shaped Nd-rich phases with hcp structure are embedded in the Nd2 Fe14B matrix or at grain boundary. Their lattice parameters are determined to be a=0. 395 nm and c=0.628 nm. |
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| Keywords: | explosively compacted Nd-Fe-B microstructure boundary phase |
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