Morphology and magnetic properties of Sm2Co7/α-Fe nanocomposite magnets produced by high energy ball milling and spark plasma sintering
来源期刊：JOURNAL OF RARE EARTHS2021年第3期
论文作者：Yitong Zhuge Yuqing Li Xiaochang Xu Dongtao Zhang Hongguo Zhang Weiqiang Liu Ming Yue
文章页码：312 - 316
摘 要：In this article,the Sm2 Co7/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 Sm2 Co7 matrix without the decrease of remanence.Optimal energy product（BH）max of 9.2 MGOe was obtained with 20 wt% α-Fe.TEM observation shows that the grain size of α-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 Sm2 Co7/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 Sm2 Co7 phase.
Yitong Zhuge，Yuqing Li，Xiaochang Xu，Dongtao Zhang，Hongguo Zhang，Weiqiang Liu，Ming Yue
Key Laboratory of Advanced Functional Materials,Ministry of Education of China,College of Materials Science and Engineering,Beijing University of Technology
摘 要：In this article,the Sm2 Co7/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 Sm2 Co7 matrix without the decrease of remanence.Optimal energy product（BH）max of 9.2 MGOe was obtained with 20 wt% α-Fe.TEM observation shows that the grain size of α-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 Sm2 Co7/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 Sm2 Co7 phase.
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