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.