Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition
Nd2Fe14B-type permanent magnets have been widely applied in various fields such as wind power, voice coil motors, and medical instruments. The large temperature dependence of coercivity, however, limits their further applications. We have systematically investigated the magnetic properties, thermal...
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doaj-341f0147b9774c3282e48e3056759e282020-11-24T21:33:11ZengAIP Publishing LLCAIP Advances2158-32262018-05-0185056203056203-510.1063/1.5006088011892ADVImproved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf additionQingzheng Jiang0Weikai Lei1Qingwen Zeng2Qichen Quan3Lili Zhang4Renhui Liu5Xianjun Hu6Lunke He7Zhiqi Qi8Zhihua Ju9Minglong Zhong10Shengcan Ma11Zhenchen Zhong12Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaGanzhou Fortune Electronics Co. Ltd., Ganzhou 341000, P.R.ChinaGanzhou Fortune Electronics Co. Ltd., Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaJiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices & Institute for Rare Earth Magnetic Materials and Devices (IREMMD), Jiangxi University of Science and Technology, Ganzhou 341000, P.R.ChinaNd2Fe14B-type permanent magnets have been widely applied in various fields such as wind power, voice coil motors, and medical instruments. The large temperature dependence of coercivity, however, limits their further applications. We have systematically investigated the magnetic properties, thermal stabilities and coercivity mechanisms of the (Pr0.2Nd0.8)13Fe81-xB6Hfx (x=0, 0.5) nanocrystalline magnets fabricated by a spark plasma sintering (SPS) technique. The results indicate that the influence of Hf addition is significant on magnetic properties and thermal stabilities of the (PrNd)2Fe14B-type sintered magnets. It is shown that the sample with x = 0.5 at 300 K has much higher coercivity and remanent magnetization than those counterparts without Hf. The temperature coefficients of remanence (α) and coercivity (β) of the (Pr0.2Nd0.8)13Fe81-xB6Hfx magnets are improved significantly from -0.23 %/K, -0.57 %/K for the sample at x = 0 to -0.17 %/K, -0.49 %/K for the sample at x = 0.5 in the temperature range of 300-400 K. Furthermore, it is found out that the domain wall pinning mechanism is more likely responsible for enhancing the coercivity of the (Pr0.2Nd0.8)13Fe81-xB6Hfx magnets.http://dx.doi.org/10.1063/1.5006088 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qingzheng Jiang Weikai Lei Qingwen Zeng Qichen Quan Lili Zhang Renhui Liu Xianjun Hu Lunke He Zhiqi Qi Zhihua Ju Minglong Zhong Shengcan Ma Zhenchen Zhong |
spellingShingle |
Qingzheng Jiang Weikai Lei Qingwen Zeng Qichen Quan Lili Zhang Renhui Liu Xianjun Hu Lunke He Zhiqi Qi Zhihua Ju Minglong Zhong Shengcan Ma Zhenchen Zhong Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition AIP Advances |
author_facet |
Qingzheng Jiang Weikai Lei Qingwen Zeng Qichen Quan Lili Zhang Renhui Liu Xianjun Hu Lunke He Zhiqi Qi Zhihua Ju Minglong Zhong Shengcan Ma Zhenchen Zhong |
author_sort |
Qingzheng Jiang |
title |
Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition |
title_short |
Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition |
title_full |
Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition |
title_fullStr |
Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition |
title_full_unstemmed |
Improved magnetic properties and thermal stabilities of Pr-Nd-Fe-B sintered magnets by Hf addition |
title_sort |
improved magnetic properties and thermal stabilities of pr-nd-fe-b sintered magnets by hf addition |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2018-05-01 |
description |
Nd2Fe14B-type permanent magnets have been widely applied in various fields such as wind power, voice coil motors, and medical instruments. The large temperature dependence of coercivity, however, limits their further applications. We have systematically investigated the magnetic properties, thermal stabilities and coercivity mechanisms of the (Pr0.2Nd0.8)13Fe81-xB6Hfx (x=0, 0.5) nanocrystalline magnets fabricated by a spark plasma sintering (SPS) technique. The results indicate that the influence of Hf addition is significant on magnetic properties and thermal stabilities of the (PrNd)2Fe14B-type sintered magnets. It is shown that the sample with x = 0.5 at 300 K has much higher coercivity and remanent magnetization than those counterparts without Hf. The temperature coefficients of remanence (α) and coercivity (β) of the (Pr0.2Nd0.8)13Fe81-xB6Hfx magnets are improved significantly from -0.23 %/K, -0.57 %/K for the sample at x = 0 to -0.17 %/K, -0.49 %/K for the sample at x = 0.5 in the temperature range of 300-400 K. Furthermore, it is found out that the domain wall pinning mechanism is more likely responsible for enhancing the coercivity of the (Pr0.2Nd0.8)13Fe81-xB6Hfx magnets. |
url |
http://dx.doi.org/10.1063/1.5006088 |
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