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利用共伴生混合稀土制備RE-Fe-B永磁材料
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內(nèi)蒙古自然科學(xué)基金（2012MS0802）


Magnetic Properties and Microstructure of Re-Fe-B Permanent Magnet Prepared Using Mixed Rare Earth of Bayan Obo
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    摘要:

    利用白云鄂博共伴生混合稀土（MM）制備了成分為(PrNd)14-xMMxFe80.4B5.6的稀土永磁材料，MM替代30%PrNd合金，磁體磁能積為238.08 kJ/m3，剩磁為1.18 T，矯頑力726.75 kA/m，發(fā)現(xiàn)La、Ce元素以氧化物的形式分布在富稀土相中，主相中存在（NdCe）2Fe14B固溶體，相比單獨(dú)添加La、Ce的磁體，獲得相同的磁性能時(shí)，(PrNd)14-xMMxFe80.4B5.6磁體的La含量較高，磁體中混合稀土La、Ce、Pr、Nd的協(xié)同作用促進(jìn)了MM的高效利用。利用高場(chǎng)動(dòng)態(tài)磁疇顯微鏡觀察了磁體的疇結(jié)構(gòu)動(dòng)態(tài)變化，磁體內(nèi)部出現(xiàn)大量的穿晶疇，穿晶疇的疇壁可穿過晶界，磁化過程中磁疇擴(kuò)展容易。

    Abstract:

    (PrNd)14-xMMxFe80.4B5.6 permanent magnet materials were prepared from mixed rare earth (MM) of Bayan obo. 30% of PrNd alloy was replaced by MM. The material exhibits a remanence of 1.18 T, a maximum energy product 238.08 kJ/m3, and an intrinsic coercivity of remanence 726.75 kA/m. Oxide of La and Ce exists in rich rare earth phase and there are (NdCe)2Fe14B and (NdLa)2Fe14B in main phase. Compared with others magnets, La content in (PrNd)14-xMMxFe80.4B5.6 magnet is higher when getting the similar magnetic performance. La, Ce, Pr and Nd in the mixed rare earth magnet act together, so MM is used efficiently. Domain structure change was observed by high field Kerr microscopy. The domain wall could be through the grain boundary, and the magnetic domain is easy to spread under magnetic field.

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張雪峰,施 堯,馬 強(qiáng),劉艷麗,史孟飛,李永峰,王高峰,趙增茹.利用共伴生混合稀土制備RE-Fe-B永磁材料[J].稀有金屬材料與工程,2015,44(3):748~752.[Zhang Xuefeng, Shi Yao, Ma Qiang, Liu Yanli, Shi Mengfei, Li Yongfeng, Wang Gaofeng, Zhao Zengru. Magnetic Properties and Microstructure of Re-Fe-B Permanent Magnet Prepared Using Mixed Rare Earth of Bayan Obo[J]. Rare Metal Materials and Engineering,2015,44(3):748~752.]
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  • 收稿日期:2014-03-18
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  • 在線發(fā)布日期: 2015-05-29
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