中文摘要：

采用气体雾化工艺和高能球磨处理技术制备了纳米晶FeSi扁平状颗粒材料。研究了高能球磨处理和热处理工艺对材料微结构、形貌和微波电磁特性的影响。结果表明：高能球磨处理使雾化粉粒形状扁平化并使其晶粒细化，从而使Fesi微粉的微波磁导率显著提高，介电常数被有效控制；热处理后可以进一步改善其微波电磁性能。对该材料制作的涂层吸波性能的测量表明，在4GHz附近微波段具有良好吸波性能。

英文摘要：

Nanocrystalline flakes of FeSi alloy were synthesized by atomization process and high energy ball milling. The effect of process conditions on the microstructure, morphology and microwave electromagnetic characteristics of FeSi particles were investigated. The results show that flaky morphology and nanocrystalline microstructure remarkably improved the microwave permeability and the permittivity are controlled effectively. The sequent annealing improved further the microwave electromagnetic performances. The coating layer made of the nanocrystalline FeSi flakes have good microwave absorbing ability at 4 GHz microwave range.