Morphology and magnetic properties of Sm2Co7/α-Fe nanocomposite magnets produced by high energy ball milling and spark plasmasintering

• 作者: Yitong Zhuge Yuqing Li Xiaochang Xu Dongtao Zhang Hongguo Zhang Weiqiang Liu Ming Yue
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: MAGNETISM AND MAGNETIC MATERIALS
• 页码范围: 312-316
• 页数: 5页
• 语种: 英文

摘要

In this article, the Sm2Co7/α-Fe nanocomposite magnets were prepared by high energy ball milling and spark plasma sintering method. The effect of soft phase content on the magnetic properties was studied. Up to 30 wt％α-Fe was added into Sm2Co7 matrix without the decrease of remanence. Optimal energy product (BH)max of 9.2MGOe was obtained with 20 wt％α-Fe. TEM observation shows that the grain size ofα-Fe is 20-50 nm which ensures a good coupling effect between soft and hard phase. One more thing needs to be mentioned is that there exists inter-diffusion between Sm-Co phase and α-Fe phase. Moreover, our results can also illustrate that the Sm2Co7/α-Fe nanocomposite magnets are able to acquire better magnetic properties than the SmCo5/α-Fe magnets prepared by the same process due to the large domain width of Sm2Co7 phase.