FeSiBCrC amorphous magnetic powder fabricated by gas-water combined atomization
FeSiBCrC amorphous magnetic powder fabricated by gas-water combined atomization
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DOI：
10.1016/j.jallcom.2020.157991
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发表时间：
2020-11
影响因子：
6.2
通讯作者：
T. Zhao;Cun-guang Chen;Xiao-Jie Wu;Chenzeng Zhang;A. Volinsky;J. Hao
中科院分区：
文献类型：
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作者：
T. Zhao;Cun-guang Chen;Xiao-Jie Wu;Chenzeng Zhang;A. Volinsky;J. Hao
非晶软磁复合材料因其在高频应用下的低磁芯损耗而备受关注。要求制备非晶软磁复合材料的粉末具有非晶结构和近球形，有利于粉末颗粒表面绝缘子的均匀涂覆。本文采用气水联合雾化工艺制备了Fe73.5Si13B11Cr1C1.5（at%）非晶态粉末，并与气水联合雾化制备的粉末进行了性能比较。气-水复合雾化粉末粒径为−60 μm，呈非晶态，矫顽力较低，颗粒形状接近球形。三种粉末制备的磁粉磁芯的磁导率随退火温度先升高后降低，磁芯损耗先减小后增大。气水复合雾化粉末制备的磁芯综合性能最好，在7.96 kA/m叠加直流磁场下，有效磁导率为26.9，相对磁导率为83.3%，在100 kHz频率下磁芯损耗为258 mW/cm3，在氮气中793 K退火后的磁化强度为0.05 T。
Amorphous soft magnetic composites have been attracting attention because of its low core loss under high frequency application. It is demanded that the powder for fabricating amorphous soft magnetic composites has amorphous structure and nearly spherical shape, which facilitates the uniform coating of insulator on the surface of powder particles. In this paper, amorphous Fe73.5Si13B11Cr1C1.5(at%) powder was produced by gas-water combined atomization process which takes advantages of both gas atomization and water atomization, and its properties was compared with powder produced by gas atomization and water atomization. Gas-water combined atomization powder with particle size of −60 μm were found to be amorphous with low coercivity, and the shape of particles was nearly spherical. The permeability of magnetic powder cores prepared with three kinds of powder first increased and then decreased with annealing temperature, and the core loss first decreased and then increased. The cores prepared with gas-water combined atomization powder showed the best overall properties, with an effective permeability of 26.9, a relative permeability of 83.3% under a superimposed DC magnetic field of 7.96 kA/m, a core loss of 258 mW/cm3under a frequency of 100 kHz, and a magnetization intensity Bmof 0.05 T after annealing at 793 K in nitrogen gas.