Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5490894 | Journal of Magnetism and Magnetic Materials | 2017 | 16 Pages |
Abstract
HDDR processed Nd-Fe-B powders blended with Nd-Cu powders were hot-pressed and then hot-deformed to obtain fully dense, anisotropic magnets. The microstructure evolution in hot-pressed and hot-deformed HDDR magnets was studied to illustrate the impact of Nd-Cu diffusion on coercivity and deformation ability. It was found that the coercivity and the deformation ability were improved significantly by Nd-Cu addition. The coercivity of hot-deformed magnets was increased from 3.81 kOe to 13.01 kOe after 2 wt% Nd-Cu additions and the annealing at 900 °C for 2 h. Scanning electron microscopy and transmission electron microscopy observations revealed that the variation in coercivity was attributed to the diffusion of Nd-Cu along the grain boundaries during hot pressing and hot deformation.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Haihang Wang, Renjie Chen, Wenzong Yin, Mingyuan Zhu, Xu Tang, Zexuan Wang, Chaoxiang Jin, Jinyun Ju, Don Lee, Aru Yan,