Overview of composition and technique process study on 2:17-type Sm–Co high-temperature permanent magnet
Overview of composition and technique process study on 2:17-type Sm–Co high-temperature permanent magnet
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DOI：
10.1007/s12598-020-01514-1
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发表时间：
2020-09
期刊：
影响因子：
8.8
通讯作者：
Chao Wang;Minggang Zhu
中科院分区：
文献类型：
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作者：
Chao Wang;Minggang Zhu
Sm-Co永磁材料具有优异的室温和高温磁性能，广泛应用于航空航天设备、电子管、传感器和混合动力汽车等领域。与Nd-Fe-B磁体相比，在高达500 °C的温度下可靠运行的能力是Sm-Co永磁体的最大优势。然而，可靠的高温磁性能易受成分和工艺过程的影响。因此，合适的成分和匹配的工艺是获得良好高温磁性能的前提。本文着重介绍了Sm、Fe、Cu、Zr含量及工艺对高温性能发展的影响，并讨论了2：17型高温Sm-Co永磁材料的高温磁化机理。
Sm–Co permanent magnets are widely used in aerospace equipments, tubes, sensors and hybrid electric vehicles due to their excellent magnetic properties at both room and high temperatures. Compared to that of Nd–Fe–B magnets, the capability of reliably operating at temperatures up to 500 °C is the biggest preponderance of Sm–Co permanent magnets. However, the reliable high-temperature magnetic properties are susceptible to composition and technique processes. So, appropriate composition and matched technique processes are prerequisites for good high-temperature magnetic properties. This review mainly emphasizes the influences of Sm, Fe, Cu and Zr contents and technique processes on development of high-temperature performance and discusses the controversial high-temperature coercivity mechanism of 2:17-type high-temperature Sm–Co magnets.