| 高磁能积低温度系数的铁基永磁合金的磁性能与组织结构 |
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| 引用本文： | 周寿增,郭灿杰,呼琴,李春和.高磁能积低温度系数的铁基永磁合金的磁性能与组织结构[J].北京科技大学学报,1988(3). |
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| 作者姓名： | 周寿增 郭灿杰 呼琴 李春和 |
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| 作者单位： | 北京钢铁学院功能教研室
(周寿增，郭灿杰，呼琴)，北京钢铁学院功能教研室(李春和) |
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| 摘 要： | 本文研究了Co和Al的添加对NdFeCoAlB永磁合金磁性能与组织结构的影响。获得一种磁能积为278.6～318.4kJ/m~3(35～40MGOe),磁感可逆温度系数α293～373K=-0.06～-0.08％/K的NdFeCoAlB系5元合金。Co主要进入四方相,提高合金的居里点,降低磁感可逆温度系数。当含Co量较高时,在合金中形成了具有MgCu_2型结构的Nd(FeCo)_2相,使合金永磁性能恶化。Al主要进入四方相,使四方相晶粒和富B相块度细化,提高了合金的矫顽力。进一步提高Al含量时,在合金中形成了新相,使合金永磁性能恶化。
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| 关 键 词： | 稀土永磁 矫顽力 |
The Magnetic Properties and Microstructure of Fe-based Permanent Magnet with High Energy Product and Low Temperature Coefficient |
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| Zhou Shouzeng,Guo Canjie,Hu Qin,Li Chunhe.The Magnetic Properties and Microstructure of Fe-based Permanent Magnet with High Energy Product and Low Temperature Coefficient[J].Journal of University of Science and Technology Beijing,1988(3). |
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| Authors: | Zhou Shouzeng Guo Canjie Hu Qin Li Chunhe |
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| Abstract: | The effects of Co and Al on magnetic properties and microstructure of Nd-Fe-B alloys are studied in this paper. A magnet with energy product of 278.6-318.4 kJ/m3 (35-40 MGOe) and reversible temperature coefficient (a), of -0.06--0.08%/K at 293-373 K is abtained. Cobalt atoms enter in the tetragonal phase, increasing Curie temperature and decreasing the reversible temperature coefficient. A new phase Nd(Fc, Co)2 with MgCu2 type structure forms in the alloy containing higher Co content. It causes the decrease of the coercivity. Alumium atoms are mainly in the tatragonal phase, it makes the grains become smaller, and rises the coercivity of the alloy. When Al content further increase, a new phase forms, which destroy the coercivity of the alloys. |
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| Keywords: | coerciyity rare earth permanent magnet |
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