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首页> 外文期刊>IEEE Transactions on Magnetics >Tailoring the Microstructure of Soft Magnetic Composites for Electric Motor Applications
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Tailoring the Microstructure of Soft Magnetic Composites for Electric Motor Applications

机译：量身定制用于电动机的软磁复合材料的微观结构

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摘要

Soft magnetic composite (SMC) material has been fabricated using 9 different powder particle fractions (smallest fraction: <50 mu m and largest: >400 mu m). The microstructure features and resulting magnetic properties have been quantified and correlated. A specific focus lies on simultaneous consideration of the effects of particle size and internal grain size. Analysis has been carried out on samples in green condition and samples annealed between 400 degrees C and 600 degrees C. Electron backscatter diffraction technology brings about a substantially additional value to characterize deformations inside the grains. By detailed advanced microstructure analysis, it is shown that the deformation and recrystallization behavior is significantly different for different particle sizes used. Particle sizes between 100 and 200 mu m show grain size distributions with the largest grains (d(50) similar to 44 mu m) in the volume of the particles resulting in the lowest hysteresis losses (P-H similar to 4 W/kg, 1 T, 50 Hz). The relationship between particle and internal grain size distribution has been analyzed to enable further improvement of SMC materials concerning hysteresis loss reduction.
机译：使用9种不同的粉末颗粒级分（最小比例：<50μm，最大比例：> 400μm）制造了软磁复合材料（SMC）。微观结构特征和产生的磁性能已被量化和关联。一个特别的重点在于同时考虑粒度和内部晶粒尺寸的影响。已对处于绿色条件下的样品和在400摄氏度至600摄氏度之间退火的样本进行了分析。电子背散射衍射技术带来了实质上附加的价值，可表征晶粒内部的变形。通过详细的高级微观结构分析，结果表明，对于所使用的不同粒径，其变形和再结晶行为存在显着差异。 100至200μm的粒径显示出粒径分布，其中颗粒体积中的最大晶粒（d（50）类似于44μm）导致磁滞损耗最低（PH近似于4 W / kg，1 T） ，50 Hz）。分析了颗粒与内部晶粒尺寸分布之间的关系，以使SMC材料能够进一步改善磁滞损耗。

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