Please wait a minute...
Chin. Phys. B, 2020, Vol. 29(5): 057501    DOI: 10.1088/1674-1056/ab7b57
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effect of annealing temperature on coercivity of Nd-Fe-B magnets with TbFeAl doping by process of hot-pressing

Ze-Teng Shu(舒泽腾)1,2, Bo Zheng(郑波)2, Guang-Fei Ding(丁广飞)2, Shi-Cong Liao(廖是聪)2, Jing-Hui Di(邸敬慧)2, Shuai Guo(郭帅)2, Ren-Jie Chen(陈仁杰)2, A-Ru Yan(闫阿儒)2, Lei Shi(石磊)1
1 Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China;
2 Chinese Academy of Sciences Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract  The Nd-Fe-B magnets are pre-sintered and then processed with hot-pressing, and the resulting magnets are called the hot-pressed pretreated (HPP) magnets. The coercivity of the HPP magnets increases as the annealed temperature increases. When the annealing temperature is 900℃, the coercivity of the magnet is only 17.6 kOe (1 Oe=79.5775 A·m-1), but when the annealing temperature rises up to 1060℃, the coercivity of the magnet reaches 23.53 kOe, which is remarkably increased by 33.7%. The microstructure analysis indicates that the grain surface of the HPP magnet becomes smoother as the annealed temperature increases. The microstructure factor α is changed according to the intrinsic coercivity model formula. The α of the magnet at 900℃ is only 0.578, but it is 0.825 at 1060℃. Microstructural optimization is due mainly to the increase of coercivity of the HPP magnet.
Keywords:  hot-pressed      coercivity      microstructure      anisotropy field  
Received:  09 January 2020      Revised:  26 January 2020      Accepted manuscript online: 
PACS:  75.60.Nt (Magnetic annealing and temperature-hysteresis effects)  
  75.50.Ww (Permanent magnets)  
  75.50.Vv (High coercivity materials)  
  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
Fund: Project supported by the Major Project of “Science and Technology Innovation 2025” in Ningbo City, China (Grant Nos. 2018B10086 and 2018B10017).
Corresponding Authors:  Bo Zheng, Shuai Guo     E-mail:  zhengbo@nimte.ac.cn;gshuai@nimte.ac.cn

Cite this article: 

Ze-Teng Shu(舒泽腾), Bo Zheng(郑波), Guang-Fei Ding(丁广飞), Shi-Cong Liao(廖是聪), Jing-Hui Di(邸敬慧), Shuai Guo(郭帅), Ren-Jie Chen(陈仁杰), A-Ru Yan(闫阿儒), Lei Shi(石磊) Effect of annealing temperature on coercivity of Nd-Fe-B magnets with TbFeAl doping by process of hot-pressing 2020 Chin. Phys. B 29 057501

[1] Gutfleisch O, Willard M A, Bruck E, Chen C H, Sankar S G and Liu J P 2011 Adv. Mater. 23 821
[2] Liu W Q, Chang C, Yue M, Yang J S, Zhang D T, Liu Y Q, Zhang J X, Yi X F and Chen J W 2013 J. Magn. 18 400
[3] Hirota K, Nakamura H, Minowa T and Honshima M 2006 IEEE Trans. Magn. 42 2909
[4] Cao X J, Chen L, Guo S, Fan F C, Chen R J and Yan A 2017 Scr. Mater. 131 24 (in Chinese)
[5] Komuro M, Satsu Y and Suzuki H 2010 IEEE Trans. Magn. 46 3831
[6] Liu X B and Altounian Z 2012 J. Appl. Phys. 111 07A701
[7] Tang M, Bao X, Lu K, Sun L, Li J and Gao X 2016 Scr. Mater. 117 60
[8] Kong J Y, Kim T H, Lee S R, Kim H J, Lee M W and Jang T S 2015 Met. Mater. Int. 21 600
[9] Sepehri-Amin H, Ohkubo T and Hono K 2010 J. Appl. Phys. 107 09A745
[10] Liu W Q, Sun H, Yi X F, Liu X C, Zhang D T, Yue M S and Zhang J X 2010 J. Alloys Compd. 501 67
[11] Bae K H, Kim T H, Lee S R, Namkung S and Jang T S 2012 J. Appl. Phys. 112 093912
[12] Song J, Guo S, Ding G F, Chen K, Chen R J, Lee D and Yan A 2019 J. Magn. Magn. Mater. 469 613
[13] Zhang T B, Zhou X Q, Yu D D, Fu Y Q, Li G J, Cui W B and Wang Q 2017 Appl. Phys. A-Mater. 123 111
[14] Bae K H, Kim T H, Lee S R, NamKung S and Jang T S 2013 IEEE Trans. Magn. 49 3251
[15] Ding G F, Guo S, Chen L, Di J H, Chen K, Chen R J, Lee D and Yan A 2018 J. Alloys Compd. 735 1176
[16] Ju J Y, T X, Chen R J, Wang J Z, Yin W Z, Li D and Yan A 2015 Chin. Phys. B 24 017504
[17] Wang Z X, Ju J Y, Wang J Z, Yin W Z, Chen R J, Li M, Jin C X, Xu Tang, Don Lee and Aru Yan 2016 Sci. Rep. 6 38335
[18] Kronmüller H 1987 Phys. Stat. Sol. (b) 144 385
[19] Givord D, Lu Q, Rossignol M F, Tenaud P and Viadieu T 1990 J. Magn. Magn. Mater. 83 183
[20] Zhou Q, Li W, Hong Y, Zhao L Z, Zhong X C, Yu H G, Huang L L and Liu Z W 2018 J. Rare Earth 36 379
[21] Hirosawa S, Matsuura Y, Yamamoto H, Fujimura S, Sagawa M and Yamauchi H 1986 J. Appl. Phys. 59 873
[1] Effect of thickness of antimony selenide film on its photoelectric properties and microstructure
Xin-Li Liu(刘欣丽), Yue-Fei Weng(翁月飞), Ning Mao(毛宁), Pei-Qing Zhang(张培晴), Chang-Gui Lin(林常规), Xiang Shen(沈祥), Shi-Xun Dai(戴世勋), and Bao-An Song(宋宝安). Chin. Phys. B, 2023, 32(2): 027802.
[2] Surface structure modification of ReSe2 nanosheets via carbon ion irradiation
Mei Qiao(乔梅), Tie-Jun Wang(王铁军), Yong Liu(刘泳), Tao Liu(刘涛), Shan Liu(刘珊), and Shi-Cai Xu(许士才). Chin. Phys. B, 2023, 32(2): 026101.
[3] Coercivity enhancement of sintered Nd-Fe-B magnets by grain boundary diffusion with Pr80-xAlxCu20 alloys
Zhe-Huan Jin(金哲欢), Lei Jin(金磊), Guang-Fei Ding(丁广飞), Shuai Guo(郭帅), Bo Zheng(郑波),Si-Ning Fan(樊思宁), Zhi-Xiang Wang(王志翔), Xiao-Dong Fan(范晓东), Jin-Hao Zhu(朱金豪),Ren-Jie Chen(陈仁杰), A-Ru Yan(闫阿儒), Jing Pan(潘晶), and Xin-Cai Liu(刘新才). Chin. Phys. B, 2023, 32(1): 017505.
[4] Optical and electrical properties of BaSnO3 and In2O3 mixed transparent conductive films deposited by filtered cathodic vacuum arc technique at room temperature
Jian-Ke Yao(姚建可) and Wen-Sen Zhong(钟文森). Chin. Phys. B, 2023, 32(1): 018101.
[5] Microstructure and hardening effect of pure tungsten and ZrO2 strengthened tungsten under carbon ion irradiation at 700℃
Chun-Yang Luo(罗春阳), Bo Cui(崔博), Liu-Jie Xu(徐流杰), Le Zong(宗乐), Chuan Xu(徐川), En-Gang Fu(付恩刚), Xiao-Song Zhou(周晓松), Xing-Gui Long(龙兴贵), Shu-Ming Peng(彭述明), Shi-Zhong Wei(魏世忠), and Hua-Hai Shen(申华海). Chin. Phys. B, 2022, 31(9): 096102.
[6] Two-dimensional Sb cluster superlattice on Si substrate fabricated by a two-step method
Runxiao Zhang(张润潇), Zi Liu(刘姿), Xin Hu(胡昕), Kun Xie(谢鹍), Xinyue Li(李新月), Yumin Xia(夏玉敏), and Shengyong Qin(秦胜勇). Chin. Phys. B, 2022, 31(8): 086801.
[7] Surface chemical disorder and lattice strain of GaN implanted by 3-MeV Fe10+ ions
Jun-Yuan Yang(杨浚源), Zong-Kai Feng(冯棕楷), Ling Jiang(蒋领), Jie Song(宋杰), Xiao-Xun He(何晓珣), Li-Ming Chen(陈黎明), Qing Liao(廖庆), Jiao Wang(王姣), and Bing-Sheng Li(李炳生). Chin. Phys. B, 2022, 31(4): 046103.
[8] Thermoelectric enhancement in triple-doped strontium titanate with multi-scale microstructure
Zheng Cao(曹正), Qing-Qiao Fu(傅晴俏), Hui Gu(顾辉), Zhen Tian(田震), Xinba Yaer(新巴雅尔), Juan-Juan Xing(邢娟娟), Lei Miao(苗蕾), Xiao-Huan Wang(王晓欢), Hui-Min Liu(刘慧敏), and Jun Wang(王俊). Chin. Phys. B, 2021, 30(9): 097204.
[9] Effect of the potential function and strain rate on mechanical behavior of the single crystal Ni-based alloys: A molecular dynamics study
Qian Yin(尹倩), Ye-Da Lian(连业达), Rong-Hai Wu(巫荣海), Li-Qiang Gao(高利强), Shu-Qun Chen(陈树群), and Zhi-Xun Wen(温志勋). Chin. Phys. B, 2021, 30(8): 080204.
[10] Microstructure and magnetocaloric properties in melt-spun and high-pressure hydrogenated La0.5Pr0.5Fe11.4Si1.6 ribbons
Qian Liu(刘倩), Min Tong(佟敏), Xin-Guo Zhao(赵新国), Nai-Kun Sun(孙乃坤), Xiao-Fei Xiao(肖小飞), Jie Guo(郭杰), Wei Liu(刘伟), and Zhi-Dong Zhang(张志东). Chin. Phys. B, 2021, 30(8): 087502.
[11] Formation of nano-twinned 3C-SiC grains in Fe-implanted 6H-SiC after 1500-℃ annealing
Zheng Han(韩铮), Xu Wang(王旭), Jiao Wang(王娇), Qing Liao(廖庆), and Bingsheng Li(李炳生). Chin. Phys. B, 2021, 30(8): 086107.
[12] Magnetic properties and resistivity of a 2:17-type SmCo magnet doped with ZrO2
Qi-Qi Yang(杨棋棋), Zhuang Liu(刘壮), Chao-Yue Zhang(张超越), Hai-Chen Wu(吴海辰), Xiao-Lei Gao(高晓磊), Yi-Long Ma(马毅龙), Ren-Jie Chen(陈仁杰), and A-Ru Yan(闫阿儒). Chin. Phys. B, 2021, 30(7): 077504.
[13] Effects of post-sinter annealing on microstructure and magnetic properties of Nd-Fe-B sintered magnets with Nd-Ga intergranular addition
Jin-Hao Zhu(朱金豪), Lei Jin(金磊), Zhe-Huan Jin(金哲欢), Guang-Fei Ding(丁广飞), Bo Zheng(郑波), Shuai Guo(郭帅), Ren-Jie Chen(陈仁杰), and A-Ru Yan(闫阿儒). Chin. Phys. B, 2021, 30(6): 067503.
[14] Effect of helium concentration on irradiation damage of Fe-ion irradiated SIMP steel at 300 ℃ and 450 ℃
Zhen Yang(杨振), Junyuan Yang(杨浚源), Qing Liao(廖庆), Shuai Xu(徐帅), and Bingsheng Li(李炳生). Chin. Phys. B, 2021, 30(5): 056107.
[15] Texture analysis of ultra-high coercivity Sm2Co7 hot deformation magnets
Qiang Ma(马强), Meishuang Jia(贾美爽), Zhifeng Hu(胡智峰), Ming Yue(岳明), Yanli Liu(刘艳丽), Tongyun Zhao(赵同云), and Baogen Shen(沈保根). Chin. Phys. B, 2021, 30(4): 047505.
No Suggested Reading articles found!