| Nd_δFe_(14)B(δ=2.18～11)纳米晶合金的性能及矫顽力机理分析 |
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| 引用本文： | 刘静,胡胜龙,黄有林,刘仲武. Nd_δFe_(14)B(δ=2.18～11)纳米晶合金的性能及矫顽力机理分析[J]. 磁性材料及器件, 2016, 0(4). DOI: 10.3969/j.issn.1001-3830.2016.04.003 |
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| 作者姓名： | 刘静 胡胜龙 黄有林 刘仲武 |
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| 作者单位： | 1. 江西应用技术职业学院机械与电子工程学院,江西赣州,341000;2. 江西应用技术职业学院资源环境与珠宝学院,江西赣州,341000;3. 南昌航空大学材料科学与工程学院,江西南昌,330063;4. 华南理工大学材料科学与工程学院,广东广州,510640 |
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| 基金项目： | 国家自然科学基金资助项目(51401103)；江西省青年自然科学基金资助项目(20151BAB216003) |
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| 摘 要： | 通过直接甩带制备出不同富稀土含量的NdδFe14B(δ=2.18~11)纳米晶合金,并对其性能和矫顽力机理进行了研究。结果表明,在最佳条件下制备的NdδFe14B合金中,随着合金中Nd含量的增加,其矫顽力从1021k A/m提高到了1713k A/m,剩磁从0.80T减小到0.38T,饱和磁极化强度Js和Js/Js(Nd2Fe14B)逐渐减小,磁能积从104k J/m3降低至29k J/m3。其中,Nd2.82Fe14B合金的Jr/Js=0.52、Nd11Fe14B合金的Jr/Js=0.51,表明磁性颗粒间交换耦合作用仍然存在,但Nd11Fe14B的交换耦合作用相对较弱;两种薄带合金的矫顽力行为均具有钉扎机制特征。通过构建NdδFe14B合金矫顽力和硬磁性颗粒间相对距离之间的关系,发现其矫顽力和距离基本满足线性关系。
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| 关 键 词： | 纳米晶NdFeB合金 交换耦合 矫顽力 |
Properties and analysis of coercivity mechanism of NdFeB nanocrystalline magnetic alloys |
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| LIU Jing,HU Sheng-long,HUANG You-lin,LIU Zhong-wu. Properties and analysis of coercivity mechanism of NdFeB nanocrystalline magnetic alloys[J]. Journal of Magnetic Materials and Devices, 2016, 0(4). DOI: 10.3969/j.issn.1001-3830.2016.04.003 |
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| Authors: | LIU Jing HU Sheng-long HUANG You-lin LIU Zhong-wu |
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| Abstract: | NdδFe14B (δ=2.18~11) nanocrystalline ribbons were obtained by melt spining process, and their properties and mechanism of coercivity were studied. For NdδFe14B alloys prepared under optimal conditions, with increasing Nd content from 12.69 at% to 42.30 at%, the coercivity increases from 1021 kA/m to 1713 kA/m, the remanence decreases from 0.80 T to 0.38 T, and the values ofJs andJs/Js(Nd2Fe14B) also decrease gradually. The exchange coupling interaction may still exist in the Nd11Fe14B alloy forJr/Js=0.51>0.5. The relationship between coercivity (Hcj) and the particle spacing (R) was also investigated,and the results show thatHcjvalue is proportional toR by calculating and plot fitting. |
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| Keywords: | nanocrystalline Nd-Fe-B alloy exchange copuling oercivity |
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