Patent number: 10741326
Abstract: A method for improvement of magnetic performance of sintered NdFeB magnet includes the following steps. Firstly, material containing element R, H and X is to be covered on a surface of the sintered NdFeB magnet to form a finish coat. After that, proceed with a diffusion treatment and an aging treatment to the sintered NdFeB magnet with the finish coat in the environment of vacuum or inert gas. R is at least one of such elements as Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. H is hydrogen. X is at least one of such elements as C, O, N, S, B, Cl and Si.
Type:
Grant
Filed:
July 12, 2016
Date of Patent:
August 11, 2020
Assignees:
NINGBO YUNSHENG CO., LTD., NINGBO YUNSHENG MAGNET DEVICES TECHNOLOGY CO., LTD.
Inventors:
Xiangke Lv, Chunguo Wang, Min Zhang, Yong Ding, Qingzhong Yang, Yiqun Hu, Jiangfeng Wang
Publication number: 20180218834
Abstract: A method for improvement of magnetic performance of sintered NdFeB magnet includes the following steps. Firstly, material containing element R, H and X is to be covered on a surface of the sintered NdFeB magnet to form a finish coat. After that, proceed with a diffusion treatment and an aging treatment to the sintered NdFeB magnet with the finish coat in the environment of vacuum or inert gas. R is at least one of such elements as Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. H is hydrogen. X is at least one of such elements as C, O, N, S, B, Cl and Si.
Type:
Application
Filed:
July 12, 2016
Publication date:
August 2, 2018
Applicants:
NINGBO YUNSHENG CO.,LTD., NINGBO YUNSHENG MAGNET DEVICES TECHNOLOGY CO., LTD .
Inventors:
Xiangke LV, Chunguo WANG, Min ZHANG, Yong DING, Qingzhong YANG, Yiqun HU, Jiangfeng WANG
