J. Mater. Sci. Technol. ›› 2020, Vol. 41: 81-87.DOI: 10.1016/j.jmst.2019.09.024
• Research Article • Previous Articles Next Articles
Jiajie Liabc*(), Xiangyun Huangab, Liangliang Zengab, Bo Ouyangc, Xiaoqiang Yua, Munan Yanga, Bin Yangb, Rawat Rajdeep Singhc, Zhenchen Zhonga*()
Received:
2019-07-22
Revised:
2019-09-23
Accepted:
2019-09-23
Published:
2020-03-15
Online:
2020-04-10
Contact:
Li Jiajie,Zhong Zhenchen
Jiajie Li, Xiangyun Huang, Liangliang Zeng, Bo Ouyang, Xiaoqiang Yu, Munan Yang, Bin Yang, Rawat Rajdeep Singh, Zhenchen Zhong. Tuning magnetic properties, thermal stability and microstructure of NdFeB magnets with diffusing Pr-Zn films[J]. J. Mater. Sci. Technol., 2020, 41: 81-87.
Fig. 2. Magnetic properties of NdFeB magnets: (a) Demagnetization curves of different thermal treatment magnets at room temperature; (b) Demagnetization curves of annealed and Pr-Zn GBDP magnets at 20, 50, 80, 120 and 180 °C; (c) Coercivity versus temperature curves of the annealed and Pr-Zn GBDP magnets; (d) Magnetic flux losses of annealed and Pr-Zn GBDP magnets exposed at 20, 50, 80, 120 and 180 °C for 2 h.
Samples | Hcj (kA m-1) | Br (T) | (BH)max (kJ m-3) | Hk/Hcj (%) |
---|---|---|---|---|
As-sintered | 963.96 | 1.212 | 280.67 | 98.00 |
Annealed | 1033.21 | 1.205 | 281.94 | 94.60 |
Pr-Zn without annealing | 1071.58 | 1.206 | 275.70 | 95.10 |
Pr-Zn with annealing | 1317.14 | 1.208 | 278.07 | 97.70 |
Table 1 Magnetic properties of different thermal treatment NdFeB magnets.
Samples | Hcj (kA m-1) | Br (T) | (BH)max (kJ m-3) | Hk/Hcj (%) |
---|---|---|---|---|
As-sintered | 963.96 | 1.212 | 280.67 | 98.00 |
Annealed | 1033.21 | 1.205 | 281.94 | 94.60 |
Pr-Zn without annealing | 1071.58 | 1.206 | 275.70 | 95.10 |
Pr-Zn with annealing | 1317.14 | 1.208 | 278.07 | 97.70 |
Main elements | 1 | 2 | 3 | 4 |
---|---|---|---|---|
O | 0.68 | 6.03 | 0.82 | 1.40 |
Fe | 71.35 | 7.8 | 70.03 | 5.23 |
Pr | 5.75 | 22.32 | 6.41 | 33.89 |
Nd | 20.37 | 60.62 | 21.11 | 57.44 |
Table 2 EDS results of magnets marked in Fig. 3 (wt.%).
Main elements | 1 | 2 | 3 | 4 |
---|---|---|---|---|
O | 0.68 | 6.03 | 0.82 | 1.40 |
Fe | 71.35 | 7.8 | 70.03 | 5.23 |
Pr | 5.75 | 22.32 | 6.41 | 33.89 |
Nd | 20.37 | 60.62 | 21.11 | 57.44 |
|
[1] | Peng Gao, Shuo Sun, Heng Li, Ranming Niu, Shuang Han, Hongxiang Zong, Hao Wang, Jianshe Lian, Xiaozhou Liao. Ultra-strong and thermally stable nanocrystalline CrCoNi alloy [J]. J. Mater. Sci. Technol., 2022, 106(0): 1-9. |
[2] | Haolin Zhu, Ling Liu, Huimin Xiang, Fu-Zhi Dai, Xiaohui Wang, Zhuang Ma, Yanbo Liu, Yanchun Zhou. Improved thermal stability and infrared emissivity of high-entropy REMgAl11O19 and LaMAl11O19 (RE=La, Nd, Gd, Sm, Pr, Dy; M=Mg, Fe, Co, Ni, Zn) [J]. J. Mater. Sci. Technol., 2022, 104(0): 131-144. |
[3] | Jie Kuang, Xiaolong Zhao, Yuqing Zhang, Jinyu Zhang, Gang Liu, Jun Sun, Guangming Xu, Zhaodong Wang. Impact of thermal exposure on the microstructure and mechanical properties of a twin-roll cast Al-Mn-Fe-Si strip [J]. J. Mater. Sci. Technol., 2022, 107(0): 183-196. |
[4] | Jiang Bi, Zhenglong Lei, Yanbin Chen, Xi Chen, Nannan Lu, Ze Tian, Xikun Qin. An additively manufactured Al-14.1Mg-0.47Si-0.31Sc-0.17Zr alloy with high specific strength, good thermal stability and excellent corrosion resistance [J]. J. Mater. Sci. Technol., 2021, 67(0): 23-35. |
[5] | Junyuan Bai, Hongbo Xie, Xueyong Pang, Guo Yuan, Lei Wang, Yuping Ren, Gaowu Qin. Nucleation and growth mechanisms of γ’’ phase with single-unit-cell height in Mg-RE-Zn(Ag) series alloys: a first-principles study [J]. J. Mater. Sci. Technol., 2021, 79(0): 133-140. |
[6] | Xing Zhou, Jingrui Deng, Changqing Fang, Wanqing Lei, Yonghua Song, Zisen Zhang, Zhigang Huang, Yan Li. Additive manufacturing of CNTs/PLA composites and the correlation between microstructure and functional properties [J]. J. Mater. Sci. Technol., 2021, 60(0): 27-34. |
[7] | Min Zha, Hong-Min Zhang, Xiang-Tao Meng, Hai-Long Jia, Shen-Bao Jin, Gang Sha, Hui-Yuan Wang, Yan-Jun Li, Hans J. Roven. Stabilizing a severely deformed Al-7Mg alloy with a multimodal grain structure via Mg solute segregation [J]. J. Mater. Sci. Technol., 2021, 89(0): 141-149. |
[8] | Jiang Bi, Zhenglong Lei, Yanbin Chen, Xi Chen, Ze Tian, Nannan Lu, Xikun Qin, Jingwei Liang. Microstructure, tensile properties and thermal stability of AlMgSiScZr alloy printed by laser powder bed fusion [J]. J. Mater. Sci. Technol., 2021, 69(0): 200-211. |
[9] | Yong Li, David San Martín, Jinliang Wang, Chenchong Wang, Wei Xu. A review of the thermal stability of metastable austenite in steels: Martensite formation [J]. J. Mater. Sci. Technol., 2021, 91(0): 200-214. |
[10] | Xuefeng Liao, Jiasheng Zhang, Jiayi He, Wenbing Fan, Hongya Yu, Xichun Zhong, Zhongwu Liu. Development of cost-effective nanocrystalline multi-component (Ce,La,Y)-Fe-B permanent magnetic alloys containing no critical rare earth elements of Dy, Tb, Pr and Nd [J]. J. Mater. Sci. Technol., 2021, 76(0): 215-221. |
[11] | Xutong Yang, Xiao Zhong, Junliang Zhang, Junwei Gu. Intrinsic high thermal conductive liquid crystal epoxy film simultaneously combining with excellent intrinsic self-healing performance [J]. J. Mater. Sci. Technol., 2021, 68(0): 209-215. |
[12] | Milad Ghayoor, Saereh Mirzababaei, Anumat Sittiho, Indrajit Charit, Brian K. Paul, Somayeh Pasebani. Thermal stability of additively manufactured austenitic 304L ODS alloy [J]. J. Mater. Sci. Technol., 2021, 83(0): 208-218. |
[13] | Jianping Lai, Wen Hu, Amit Datye, Jingbei Liu, Jan Schroers, Udo D. Schwarz, Jiaxin Yu. Revealing the relationships between alloy structure, composition and plastic deformation in a ternary alloy system by a combinatorial approach [J]. J. Mater. Sci. Technol., 2021, 84(0): 97-104. |
[14] | Binbin Zhang, Weichen Xu, Qingjun Zhu, Baorong Hou. Scalable, fluorine free and hot water repelling superhydrophobic and superoleophobic coating based on functionalized Al2O3 nanoparticles [J]. J. Mater. Sci. Technol., 2021, 66(0): 74-81. |
[15] | Xiaokang He, Mingyang Ni, Jianpeng Wu, Shouhu Xuan, Xinglong Gong. Hard-magnetic liquid metal droplets with excellent magnetic field dependent mobility and elasticity [J]. J. Mater. Sci. Technol., 2021, 92(0): 60-68. |
Viewed | ||||||
Full text |
|
|||||
Abstract |
|
|||||