多种软磁合金及金属非晶材料的磁屏蔽性能研究

针对部分航天器组件易受磁场影响的问题,文章选取了6种目前常用的软磁合金及金属非晶材料,研究了它们对于弱磁场波动、稳恒磁场以及低频交流磁场的屏蔽效果,结果表明,材料的磁导率与矫顽力对磁屏蔽性能有较大影响,其中矫顽力与磁屏蔽性能的负相关性更好,即矫顽力越低,材料的磁屏蔽性能越好。对于测试的6种材料,铁镍合金材料与钴基非晶材料的磁屏蔽性能优于其他4种,铁镍合金材料在1 kHz以下磁屏蔽性能更佳,钴基非晶材料在50 kHz以下具有一定磁屏蔽效果。

Magnetic shielding performance of various soft magnetic alloys and metallic amorphous materials

This paper focuses on the effect of magnetic fields on some spacecraft internal components. It is shown that the magnetic shielding by soft magnetic materials could efficiently protect those components. The tests are carried out for six kinds of commonly used soft magnetic materials, focusing on their efficiency of shielding under quazi-zero magnetic field, constant magnetic field, and low-frequency magnetic test. Test results show that the magnetic permeability and coercive force of the material have a great effect on the shielding effectiveness, especially, the coercive force shows an obvious negative correlation with the shielding effectiveness. It is also shown that the shielding property of Fe-Ni alloy and Co-based amorphous materials are better than the other four tested materials:they show their outstanding effect in the frequency ranges below 1 kHz and above 50 kHz, respectively.