Coercivity enhancement in Nd-Fe-B magnetic powders by Nd-Cu-Al grain boundary diffusion

被引：19
|
作者：
Wang, Yongli [1 ]
Luo, Yang [1 ]
Wang, Zilong [1 ]
Wu, Guiyong [1 ]
Xie, Jiajun [1 ]
Yan, Wenlong [1 ]
Yu, Dunbo [1 ]
机构：
[1] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 458卷
关键词：
Melt-spun Nd-Fe-B; NdCuAl alloy; Grain boundary; Coercivity; Thermal stability; NANOCOMPOSITE MAGNETS; MICROSTRUCTURE;
D O I：
10.1016/j.jmmm.2018.02.082
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A significant enhancement in coercivity of Nd(7.92)Pr(2.20)Fe(83.91)ZrxB(5.57)Al(0.4-x) powders was achieved by Nd80Cu10Al10 grain boundary diffusion. The room temperature coercivity was drastically increased from 7.4 kOe to 23.14 kOe by the diffusion process with the content 30% of Nd80Cu10Al10 alloy. Nd-Cu-Al alloy diffusion process resulted in grain growth and formed continuous grain boundary phases. The boundary layers were very effective in pinning the motion of domain walls, leading to an increased coercivity. In addition, an increased coercivity was also obtained from 3.1 kOe to 9.8 kOe at 175 degrees C in the bonded magnets with the diffusion of 30% content NdCuAl alloy. So the thermal stability of the bonded magnets was improved. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：85 / 89
页数：5
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