| Title | Coercivity enhancement in anisotropic Pr13Fe79.4B7Nb0.3Ga0.3 powders |
| Authors | Lin, Zhong Han, Jingzhi Liu, Shunquan Xing, Meiying Zhang, Yan Wang, Changsheng Yang, Jinbo Yang, Yingchang |
| Affiliation | Peking Univ, Sch Phys, Beijing 100871, Peoples R China. |
| Keywords | MAGNETIC-PROPERTIES HDDR POWDERS DISPROPORTIONATION PR ALLOYS ZR ADDITIONS TEXTURE BORIDES CO |
| Issue Date | 2012 |
| Publisher | 应用物理杂志 |
| Citation | JOURNAL OF APPLIED PHYSICS.2012,111,(7). |
| Abstract | Highly anisotropic Pr13Fe79.4B7Nb0.3Ga0.3 powders with a residual magnetization of 1.4 T, an intrinsic coercivity of 10 kOe, and a maximum energy product of 32 MGOe were obtained by a modified hydrogenation disproportionation desorption recombination (HDDR) process. It was found that self-organized rod-like disproprotionation microstructure is helpful for the formation of anisotropy (the crystal texture). To further improve the coercivity, the HDDR treated powders were mixed with Pr68Cu32 powders and then were heated in vacuum. As a result, the coercivity of the HDDR powders was enhanced from 10 kOe to 14 kOe. Microstructure investigations show that after heat treatment, the grain-boundary phase becomes thicker and is rich in Pr and Cu elements. The modified grain-boundary layer may cause a stronger magnetic decoupling effect among Pr2Fe14B grains and is helpful for the enhancement of coercivity. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3677664] |
| URI | http://hdl.handle.net/20.500.11897/148425 |
| ISSN | 0021-8979 |
| DOI | 10.1063/1.3677664 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
