采用水雾化工艺和高能球磨处理技术制备纳米晶FeSiAlCr扁平状合金粉。重点研究了高能球磨处理工艺对材料微结构、形貌和微波电磁性能的影响，结果发现高能球磨处理可使球形雾化粉外形扁平化并可细化其晶粒，促使其纳米晶化；从而使FeSiAlCr微粉的微波磁导率得以显著提高，介电常数得以控制。还研究了后续热处理工艺的作用，发现热处理后可以进一步改善其微波电磁性能。采用该材料制作的涂层吸波性能测量结果表明，在4 GHz附近的微波段具有良好吸波性能，有望在抗电磁干扰和微波吸收领域获得广泛应用。
Nanocrystalline flakes of FeSiAlCr were synthesized by atomization process and high energy ball milling. Effect of process conditions on microstructure, morphology and microwave electromagnetic characteristics of FeSiAlCr particles were investigated. Results show that flaky morphology and nanocrystalline microstructure were gained by process of high energy ball milling. Thus, microwave permeability were improved remarkably and permittivity were controlled effectively. Effect of sequent annealing was also discussed and it was found that microwave electromagnetic performances were improved further. Microwave absorbing ability of coating layer made of the nanocrystalline FeSiAlCr flakes proved that the materials can be applied in suppression of electromagnetic interference or microwave absorption.
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| [3] | |
| [4] | |
| [5] |
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