Effects of aspect ratio and particle size on the microwave properties of Fe–Cr–Si–Al alloy flakes

The structural and electromagnetic properties of gas atomized Fe–Cr–Si–Al alloy (SMSS) powders flattened by ball milling were studied. It is found that the aspect ratio of the powders with the same particle sizes of 48–55 μm increases with the milling time. With the increase of the aspect ratio, the...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2007-09, Vol.466 (1), p.178-182
Main Authors: Wang, Xian, Gong, Rongzhou, Li, Peigang, Liu, Lingyun, Cheng, Weiming
Format: Article
Language:English
Subjects:
Applied sciences
Aspect ratio
Crystal structure
Electromagnetic
Exact sciences and technology
Fe–Cr–Si–Al alloy
Metal powders
Metals. Metallurgy
Particle size
Powder metallurgy. Composite materials
Production techniques
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Summary:The structural and electromagnetic properties of gas atomized Fe–Cr–Si–Al alloy (SMSS) powders flattened by ball milling were studied. It is found that the aspect ratio of the powders with the same particle sizes of 48–55 μm increases with the milling time. With the increase of the aspect ratio, the complex permittivity, permeability and intensity of reflectivity peak increase, respectively, and the matching frequency shifts to low frequency due to the improved wave impedance matching and the increase of real part of complex permittivity and permeability. A similar trend of the microwave properties with the decrease of the particle size can be also observed.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2007.02.051