Abstract
FeSiAl magnetic powder contains high cost-performance as inductance components, which is widely used in various fields. In the present investigation the structure, magnetic properties and properties of magnetic powder cores prepared by strip cast ingot process were studied, and then compared with FeSiAl magnetic powder prepared by ingot cast broken process. The results show that strip cast sheet contained much little grain which surround with big grain, while the ingot cast broken has big grain connect with each other. For FeSiAl magnetic powder prepared by strip cast ingot process, the bigger grains were strip, the smaller grains were irregular shape, the surface of the powder was coarse, the powder prepared by strip cast ingot process was good for keeping the insulation film perfectly. For FeSiAl magnetic powder prepared by ingot cast broken, much of the powder was irregular bulk shape, and the grain corner was sharp, which is not good for insulation coating. Compared the patterns of strip cast ingot powder with the patterns of ingot cast broken powder, the diffraction peak of the patterns of strip cast ingot process powder became broaden. The initial magnetization curves of FeSiAl were obtained by vibrating sample magnetometer (VSM), observing that the saturation magnetization of strip cast magnetic powder was greater than that of ingot cast broken.
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