Study of sintered Nd-Fe-B magnet with high performance of H-cj (kOe) + (BH)(max) (MGOe) > 75
文献类型：期刊论文
| 作者 | Hu, BP ; Niu, E ; Zhao, YG ; Chen, GA ; Chen, ZA ; Jin, GS ; Zhang, J ; Rao, XL ; Wang, ZX |
| 刊名 | AIP ADVANCES
 |
| 出版日期 | 2013 |
| 卷号 | 3期号:4 |
| ISSN号 | 2158-3226 |
| 关键词 | boron alloys coercive force corrosion resistance crystal microstructure grain boundary diffusion iron alloys neodymium alloys permanent magnets sintering |
| 通讯作者 | Hu, BP (reprint author), Beijing Zhong Ke San Huan Res, 10 Chuangxin Rd, Beijing 102200, Peoples R China. |
| 中文摘要 | We have developed a Nd-Fe-B sintered magnet of extremely high performance. The intrinsic coercivity H-cj is as high as 35.2 kOe (2803kA/m) together with the maximum energy product (BH)(max) of 40.4 MGOe (321.6kJ/m(3)). These values result in H-cj (kOe)+(BH)(max) (MGOe) > 75. Between 293K (20 degrees C) and 473 K(200 degrees C), the temperature coefficients of remanence and intrinsic coercivity are alpha(Br) = -0.122%/degrees C and alpha H-cj = -0.403%/degrees C, respectively. A maximum operating temperature of 503 K (230 degrees C) is obtained when permeance coefficient P-c = -B/H = 2. Grain boundary diffusion (GBD) technique on magnet surface has been developed to increase H-cj by 3.6 kOe without significantly decrease of B-r and (BH)(max). The intrinsic coercivity of the GBD treated magnet H-cj(C) has a linear relationship with that of the untreated magnet H-cj(B) between 200 K and 473 K (in unit of kOe): H-cj(C) = 1.03H(cj)(B) + 2.38. The enhancement of H-cj by GBD treatment has contributions not only from the improvement of microstructure but also from the increase of H-a in the grain surface layer. It is also found that GBD treatment brings no deterioration in corrosion resistance of untreated magnet. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4803657] |
| 资助信息 | National High-Tech Research and Development Program of China (863 Program) [2010AA03A401, 2011AA03A401] |
| 语种 | 英语 |
| 公开日期 | 2014-01-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57501]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Hu, BP,Niu, E,Zhao, YG,et al. Study of sintered Nd-Fe-B magnet with high performance of H-cj (kOe) + (BH)(max) (MGOe) > 75[J]. AIP ADVANCES,2013,3(4). |
| APA | Hu, BP.,Niu, E.,Zhao, YG.,Chen, GA.,Chen, ZA.,...&Wang, ZX.(2013).Study of sintered Nd-Fe-B magnet with high performance of H-cj (kOe) + (BH)(max) (MGOe) > 75.AIP ADVANCES,3(4). |
| MLA | Hu, BP,et al."Study of sintered Nd-Fe-B magnet with high performance of H-cj (kOe) + (BH)(max) (MGOe) > 75".AIP ADVANCES 3.4(2013). |
入库方式： OAI收割
来源：物理研究所
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