高矫顽力2：17型SmCo永磁合金的时效处理与磁性能的研究

Aging Treatment and Magnetic Properties for the 2:17 Type SmCo Permanent Magnets of High Coercivity

摘要:

利用X射线衍射仪、扫描电子显微镜、X射线电子能谱分析以及磁性测量的方法，研究了高矫顽力2：17型钐钴稀土永磁合金在等级时效过程中磁性能的变化与时效处理条件及显微组织结构的关系。试验结果表明：合金一经时效，就由单相固溶体分解为2：17相和1：5相，在随后降低温度的等级时效过程中，内禀矫顽力Hci的提高可以认为是由两相成分的变化进而导致畴壁能差的变化引起的，另外时效过程中产生的晶界析出物对矫顽力的提高也起了一定的作用。

Abstract:

By using X-ray diffraction, scan electron microscope, X-ray electron energy analysis and magnetic measurement, the relationship between magnetic properties and microstructure for the high intrinsic coercivity 2:17 SmCo permanent magnets during aging treatment were investigated. It is found that the alloy decomposed into a 2 : 17 phase and a 1: 5 phase as soon as the aging treatment started, and the precipitates at grain boundaries have an effect on the enhancement of coercivity. The variation of intrinsic coercivity at different aging processes can be considered as the variation of the domain wall energy difference between the two phases.