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Phase structure evolution and coercivity mechanism of high-Co containing permanent magnets |
| Min Huang(黄敏)1,2, Yong Ding(丁勇)1,2,†, Zhihe Zhao(赵之赫)1,2, Chunguo Wang(王春国)1,2, Bo Zhou(周波)1,2, Lei Liu(刘雷)1,2, Yingli Sun(孙颖莉)1,2,‡, and Aru Yan(闫阿儒)1,2 |
1 CISRI & NIMTE Joint Innovation Center for Rare Earth Permanent Magnets, CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract The phase structure and magnetic properties of high-Co containing permanent magnets with high thermal stability have been systematically studied in this work. It is abnormal that the coercivity of annealed samples was slightly lower than that of sintered samples, while the coercivity was usually enhanced after annealing in conventional Nd-Fe-B samples. Further analysis showed that in addition to RE$_{2}$(Fe,Co)$_{14}$B main phase and RE-rich grain boundary phase, there were also new Co-rich magnetic phases located in the grain boundary. During annealing, the phase structures of high-Co containing magnets were readjusted, especially the increasing Co-rich magnetic phase and emerging RE-rich particles precipitated from the main phase. Eventually, the isolated RE-rich particles would act as the pinning center of the domain wall movement in demagnetization process. It was confirmed that the coercivity of annealed high-Co containing magnets was controlled by both nucleation and pinning. Pinning mechanism can partially compensate for the weakening of magnetic isolation due to increased Co-rich magnetic phase, which explained the moderate decrease in coercivity of annealed high-Co containing magnets. The discovery of new coercivity mechanism contributed to in-depth understanding of high-Co containing magnets.
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Received: 07 April 2024
Revised: 21 July 2024
Accepted manuscript online: 06 August 2024
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PACS:
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75.50.Ww
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(Permanent magnets)
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75.60.-d
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(Domain effects, magnetization curves, and hysteresis)
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75.60.Jk
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(Magnetization reversal mechanisms)
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| Fund: Project supported by National Key R&D Program of China (Grant No. 2021YFB3803003) and Youth Innovation Promotion Association CAS (Grant No. 2023311). |
Corresponding Authors:
Yong Ding, Yingli Sun
E-mail: dingyong@nimte.ac.cn;yinglisun@nimte.ac.cn
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Cite this article:
Min Huang(黄敏), Yong Ding(丁勇), Zhihe Zhao(赵之赫), Chunguo Wang(王春国), Bo Zhou(周波), Lei Liu(刘雷), Yingli Sun(孙颖莉), and Aru Yan(闫阿儒) Phase structure evolution and coercivity mechanism of high-Co containing permanent magnets 2024 Chin. Phys. B 33 117503
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[1] Matsuura Y 2006 J. Magn. Magn. Mater. 303 344
[2] Gutfleisch O, Willard M A, Brück E, Chen C H, Sankar S G and Liu J P 2011 Adv. Mater. 23 821
[3] Coey J M D 2020 Engineering 6 119
[4] Prashanth N A 2022 Mater Today: Proc 49 731
[5] Li Y H, Fan X D, Jia Z, Fan L, Ding G F, Liu X C, Guo S, Zheng B, Cao S, Chen R J and Yan A R 2024 Chin. Phys. B 33 037508
[6] Sepehri-Amin H, Hirosawa S and Hono K 2018 Handb. Magn. Mater. 27 269
[7] Skokov K P and Gutfleisch O 2018 Scr. Mater. 154 289
[8] Sagawa M, Hirosawa S, Yamamoto H, Fujimura S and Matsuura Y 1987 J. Appl. Phys. 26 785
[9] Hirosawa S, Matsuura Y, Yamamoto H, Fujimura S, Sagawa M and Yamauchi H 1986 J. Appl. Phys. 59 873
[10] Sinnema S, Radwanski R J, Franse J J M, de Mooij D B and Buschow K H J J 1984 Magn. Magn. Mater. 44 333
[11] Zhou S Z, Guo C J, Hu Q and Li C H 1988 Journal of Beijing University of Iron and Steel Technology 10 317
[12] Li W, Jiang L, Wang D W, Sun T D and Zhu J H 1986 J. Less-Common. Met. 126 95
[13] Mottram R S, Williams A J and Harris I R 2000 J. Magn. Magn. Mater. 217 27
[14] Mottram R S, Williams A J and Harris I R 2000 J. Magn. Magn. Mater. 222 305
[15] Li D, Dong S Z and Xu J Y 2021 Powder Metallurgy Industry 31 25
[16] Ding G F, Guo S, Cai L W, Chen L, Yan C J, Lee D and Yan A R 2015 IEEE Trans. Magn. 8 2100504
[17] Zhang J T, Xu J Y, Hu C L, Meng R Y and Dong S Z 2022 J. Chin. Soc. Rare Earths 40 236
[18] Jin M X, Fan S N, Kou M P, Wang H Q, Jia Z, Li Y H, Ding G F, Cao S, Fan X D, Guo S, Chen R J and Yan A R 2023 J. Alloy Compd. 943 169180
[19] Wu Y Y, Skokov K P, Schäfer L, Maccari F, Aubert A, Rao Z Y, Schweinar K, Gault B, Xu H, Jiang C B and Gutfleisch O 2022 Acta Mater. 240 118311
[20] Arai S and Shibata T 1985 IEEE Trans. Magn. 21 1952
[21] Xu J Y, Zhang J T, Meng R Y, Chen H S, Fang Y K, Dong S Z and Li W 2023 Acta Phys. Sin. 72 077502 (in Chinese)
[22] Zhang J T, Xu J Y, Jin J Y, Meng R Y and Dong S Z 2022 Acta Phys. Sin. 71 167502 (in Chinese)
[23] Xu J Y, Hu C L, Zhang J T, Dong S Z and Chen H S 2022 Met. Funct. Mater. 1 106
[24] Wu Y Y, Skokov K P, Schäfer L, Maccari F, Aubert A, Xu H, Wu H C, Jiang C B and Gutfleisch O 2022 Acta Mater. 235 118062
[25] Wu Y Y, Skokov K P, Schäfer L, Maccari F, Xu H, Wang X X, Jiang C B and Gutfleisch O 2024 Acta Mater. 263 119517
[26] Huang Q F, Jiang Q Z, Zhong K X, Chen D K, Xu D Q, Shi D W, Fu G, Yan J L, Rehman S U, Ma Q, Liu R H and Zhong Z C 2024 J. Mater. Sci. Technol. 181 63
[27] Pope C G 1997 J. Chem. Educ. 74 129
[28] Yang M N, Wang H, Hu Y F, Yang L Y, Maclennan A and Yang B 2017 J. Alloy Compd. 710 519
[29] Li C H, Zhao X T, Liu L, Liu W, Ye Z X, Wu J X, Li Y, Ma J, Ju H Z, Song Y H and Zhang Z D 2023 J. Alloys Compd. 960 170816 |
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