Fabrication of Periodic Fe Film-CI@EP Coating and Optimization of Its Radar and Infrared Compatible Stealth Performance
With the rapid development of military detection technology,there is an urgent need for stealth materials with radar/infrared compatible stealth performance.Taking the carbonyl iron(CI)as the absorber and epoxy resin(EP)as the binder,the CI@EP absorbing coatings were prepared by using a scratch coating method.Subsequently,iron film with periodic structures was prepared on the surface of the absorbing coating using magnetron sputtering and laser engraving techniques.The compatible stealth coating with radar/infrared stealth performance was obtained,and the influence of the thickness and area ratio of the iron film and the filler ratio of carbonyl iron on the microwave absorption/infrared emissivity of the compatible coatings were investigated in detail.The results show that when the filler ratio of carbonyl iron powder is 75wt%,the thickness of the iron film is 100 nm,and the area fraction of the iron film is 80%,the performance of the compatible stealth coating is best.In 8.2-12.4 GHz,the microwave reflectivity is less than-8.75 dB,and the infrared emissions in the middle and far infrared bands are 0.279 and 0.338,respectively.
carbonyl ironperiodic Fe filmmagnetron sputteringmicrowave absorptioninfrared emissivity
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