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Submicron α-Fe/polyamide composite absorber coating by low temperature high velocity air fuel spray technique by Xiaojing Yuan; Hangong Wang; Bailin Zha; Genliang Hou; Pingjun Hou is a Engineering article available to read on EtoBox.

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The composite absorbing coating is preferential in the microwave absorber, usually covering on the metals substrate. In this paper, the submicron α-Fe/polyamide absorber composite coating was deposited by a Low Temperature High Velocity Air Fuel spraying technique. The microstructure and the electromagnetic parameters of coating and powders were tested. It shows that the coating is dense and has a low porosity. Especially, α-Fe particles are injected into polyamide surface. And the microwave reflectivity coefficient of the coating was calculated with permeability and permittivity of the powders. There is a relationship between the mass fraction of composite powders and microwave absorption ability of coating. The microwave reflectivity coefficient of composite coating is high relative to the electromagnetic wave frequency. At the percolation threshold value (α-Fe content is about 0.75), the composite coating can absorb electromagnetic wave strongly. Additionally, with the increase of coating thickness, the minimal reflectivity coefficient moves to the low microwave frequency. There exists an appropriate coating thickness in order to absorb the electromagnetic wave energy largely. S

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Author

Xiaojing Yuan; Hangong Wang; Bailin Zha; Genliang Hou; Pingjun Hou

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0257-8972)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)