High-temperature magnetic properties of anisotropic MnBi/NdFeB hybrid bonded magnets

• 作 者: Dong-Tao Zhang Peng-Fan Wang Ming Yue Wei-Qiang Liu Jiu-Xing Zhang Jennifer Anand Sundararajan You Qiang
• 机 构: College of Materials Science and Engineering, Beijing University of Technology,Physics Department, U
• 出 处: Rare Metals
• 发表日期: 2016年06期
• 关键词: Hybrid bonded magnet NdFeB MnBi Coercivity temperature coefficient

Anisotropic Mn Bi/Nd Fe B(Mn Bi contents of0 wt%, 20 wt%, 40 wt%, 60 wt%, 80 wt%, and 100 wt%)hybrid bonded magnets were prepared by molding compression using Mn Bi powders and commercial hydrogenation disproportionation desorption and recombination(HDDR) Nd Fe B powders. Magnetic measurements at room temperature show that with Mn Bi content increasing, the magnetic properties of the Mn Bi/Nd Fe B hybrid bonded magnets all decrease gradually, while the density of the hybrid magnets improves almost linearly. In a temperature range of 293–398 K, the coercivity temperature coefficient of the hybrid magnets improves gradually from-0.59 %áK~(-1)for the pure Nd Fe B bonded magnet to-0.32 %áK~(-1)for the hybrid bonded magnet with 80 wt%Mn Bi, and the pure Mn Bi bonded magnet exhibits a positive coercivity temperature coefficient of 0.61 %áK~(-1).

Anisotropic Mn Bi / Nd Fe B (Mn Bi contents of 0 wt%, 20 wt%, 40 wt%, 60 wt%, 80 wt%, and 100 wt%) hybrid bonded magnets were prepared by molding compression using Mn Bi powders and commercial Magnetic measurement at room temperature show that with Mn Bi content increasing, the magnetic properties of the Mn Bi / Nd Fe B hybrid bonded magnets all decrease gradually, while the density of the hybrid (HDDR) Nd Fe B powders. In a temperature range of 293-398 K, the coercivity temperature coefficient of the coupling magnets improves gradually from-0.59% áK -1 for the pure Nd Fe B bonded magnet to-0.32% áK ~ ( -1) for the hybrid bonded magnet with 80 wt% Mn Bi, and the pure Mn Bi bonded magnet exhibits a positive coercivity temperature coefficient of 0.61% áK ~ (-1).