Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets

doi:10.1016/j.jmmm.2020.166491

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets
	Li, Weidong; Yang, Lijing; Zhang, Qingke; Xu, Cheng; Zhu, Qihang; Song, Zhenlun; Zheng, Bizhang; Hu, Fangqin; Jiang, Jianjun
刊名	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
	2020
卷号	502
关键词	RARE-EARTH-ELEMENTS COERCIVITY ENHANCEMENT TBF3 DIFFUSION DY TEMPERATURE MECHANISM
DOI	10.1016/j.jmmm.2020.166491
英文摘要	The effect of heavy rare earth element (HREE, Tb and Dy) coating thickness on the grain boundary diffusion process (GBDP) of sintered Nd-Fe-B magnets is investigated. The distribution of HREE concentration fits well with the distribution depicted by the dual-trend diffusion model for the magnets with thin HREE coatings. However, when the HREE coating is thicker than a critical value, two new types of structures of HREE distribution, namely, the anti-shell/core structure and the transitional structure, besides the well-reported shell/core structure, appear sequentially around the Nd-Fe-B grains near the close surface of the diffused magnets. The evolution of the microstructures and the magnetic properties of the diffused magnets are further studied on the basis of the dual-trend diffusion model. The coercivity of the diffused magnets with thick HREE coatings slowly improves when anti-shell/core and transitional structures form on the outer layer of the diffused magnets. The ultimate coercivity of the HREE-diffused magnets is the result of the combined action of the above three structures.
学科主题	Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19622]
专题	2020专题
作者单位	Song, ZL (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China.
推荐引用方式 GB/T 7714	Li, Weidong,Yang, Lijing,Zhang, Qingke,et al. Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2020,502.
APA	Li, Weidong.,Yang, Lijing.,Zhang, Qingke.,Xu, Cheng.,Zhu, Qihang.,...&Jiang, Jianjun.(2020).Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,502.
MLA	Li, Weidong,et al."Effect of the grain boundary Tb/Dy diffused microstructure on the magnetic properties of sintered Nd-Fe-B magnets".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 502(2020).