High temperature properties improvement and microstructure regulation of Sm2Co17-based permanent magnet
High temperature properties improvement and microstructure regulation of Sm2Co17-based permanent magnet
复制标题
Sm2Co17基永磁体高温性能改善及微观组织调控
DOI：
10.1063/1.5129687
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发表时间：
2019-12-01
期刊：
影响因子：
1.6
通讯作者：
Li, Wei
中科院分区：
文献类型：
--
作者：
Wang, Chao;Yu, Nengjun;Li, Wei
传统的Sm 2Co 17基永磁材料的高温磁性能可以通过化学成分和工艺的调整得到进一步的改善。Sm（CobalFe0.1Cu0.09Zr0.03）z（z=7.0-7.3）磁体的矫顽力随Sm含量的变化而波动较大，Sm（CobalFe0.1Cu0.09Zr0.03）7.2磁体表现出优异的磁性能，室温下（BH）max为22.5MGOe，矫顽力为28.3kOe，Br为9.65kG。同时通过固溶条件的优化，Sm（CobalFe0.1Cu0.09Zr0.03）7.2磁体具有优良的磁性能，在500 °C时Br=7.22 kG，Hcj=7.6 kOe，（BH）max=11.6 MGOe。随着淬火温度从420 °C增加到830 °C，β（室温至500°C的矫顽力温度系数）可以从−0.134%/°C优化到+0.1113%/°C，但Hcj从28 kOe劣化到1.4 kOe。利用TEM EDS分析了420 °C和830 °C淬火的Sm（CobalFe0.1Cu0.09Zr0.03）7.2合金的Cu含量在胞界的分布，结果表明Cu的分布是引起Hcj和β变化的主要原因。Sm（CobalFe0.1Cu0.09Zr0.03）z（z=7.0-7.3）磁体的矫顽力随Sm含量的变化而波动较大，Sm（CobalFe0.1Cu0.09Zr0.03）7.2磁体表现出优异的磁性能，室温下（BH）max为22.5MGOe，矫顽力为28.3kOe，Br为9.65kG。同时通过固溶条件的优化，Sm（CobalFe0.1Cu0.09Zr0.03）7.2磁体具有优良的磁性能，在500 °C时Br=7.22 kG，Hcj=7.6 kOe，（BH）max=11.6 MGOe。随着淬火温度从420 °C增加到830 °C，β（室温至500°C的矫顽力温度系数）可以从−0.134%/°C优化到+0.1113%/° C，但Hcj从28 kOe劣化到1.4 kOe。Sm（CobalFe0.1Cu0.09Zr0.03）7.2合金在420 °C和830 °C淬火时，胞间Cu含量的分布是一个很好的关系。
It is well known that the high temperature magnetic properties of traditional Sm2Co17-based magnets can be further improved through adjustment of chemical composition and technique process. The Hcj of Sm(CobalFe0.1Cu0.09Zr0.03)z (z=7.0-7.3) magnets fluctuate over a large range at the variation of Sm content, and Sm(CobalFe0.1Cu0.09Zr0.03)7.2 magnet shows excellent magnetic properties as (BH)max of 22.5 MGOe, Hcj of 28.3 kOe and Br of 9.65 kG at room temperature respectively. Meantime through optimization of solid solution conditions, the Sm(CobalFe0.1Cu0.09Zr0.03)7.2 magnets possess excellent magnetic properties as Br=7.22 kG, Hcj=7.6 kOe, (BH)max=11.6 MGOe at 500 °C. The β (temperature coefficient of coercivity from room temperature to 500°C) can be optimized to +0.1113%/°C from −0.134%/°C as quenching temperature increases from 420 °C to 830 °C, but Hcj deteriorates to 1.4 kOe from 28 kOe. Distribution of Cu content in cell boundaries for Sm(CobalFe0.1Cu0.09Zr0.03)7.2 quenched at 420 °C and 830 °C was analyzed using TEM-EDS, the result indicates that distribution of Cu is the main reason to give rise to the variation of Hcj and β.It is well known that the high temperature magnetic properties of traditional Sm2Co17-based magnets can be further improved through adjustment of chemical composition and technique process. The Hcj of Sm(CobalFe0.1Cu0.09Zr0.03)z (z=7.0-7.3) magnets fluctuate over a large range at the variation of Sm content, and Sm(CobalFe0.1Cu0.09Zr0.03)7.2 magnet shows excellent magnetic properties as (BH)max of 22.5 MGOe, Hcj of 28.3 kOe and Br of 9.65 kG at room temperature respectively. Meantime through optimization of solid solution conditions, the Sm(CobalFe0.1Cu0.09Zr0.03)7.2 magnets possess excellent magnetic properties as Br=7.22 kG, Hcj=7.6 kOe, (BH)max=11.6 MGOe at 500 °C. The β (temperature coefficient of coercivity from room temperature to 500°C) can be optimized to +0.1113%/°C from −0.134%/°C as quenching temperature increases from 420 °C to 830 °C, but Hcj deteriorates to 1.4 kOe from 28 kOe. Distribution of Cu content in cell boundaries for Sm(CobalFe0.1Cu0.09Zr0.03)7.2 quenched at 420 °C and 830 °C was a...