Uneven Evolution of Microstructure, Magnetic Properties and Coercivity Mechanism of Mo-Substituted Nd-Ce-Fe-B Alloys

• 作者: Li-Li Zhang Jie Song Sajjad Ur Rehman Jia-Jie Li Lei Wang Mu-Nan Yang Ren-Hui Liu Qing-Zheng Jiang Zhen-Chen Zhong
• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2021,（4）
• 页码范围: 590-596
• 页数: 7页
• 语种: 英文

摘要

The purpose of this paper is to study the influence of Mo addition on the phase morphologies,microstructures and magnetic properties of the designated alloys.It is found out that the coercivity Hcj increases unevenly from 12.2 kOe for (Nd0.8Ce0.2)13Fe82B5 to the maximum value of 13.3 kOe for (Nd0.8Ce0.2)13Fe80B5Mo2.The transmission electron microscopy images demonstrate that the grain size decreases with the addition of Mo,which indicates that Mo has grain refinement effect.The correlative analysis gives rise to the conclusion that the coercivity mechanism of the investigated alloys is dominated by pinning type.All in all,the enhancement of the magnetic properties is mainly attributed to the synergistic impact of grain refinement,pinning effects and the microstructural homogenization.The research may shed light on the potential development and application of rare earth-based counterpart magnets.