DEVELOPMENT OF MXENE BASED NANOCOMPOSITES FOR RADAR ABSORBING MATERIALS

Date

2024-9-2

Author

Adalı, Sabri Gökay

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Low radar visibility is increasingly crucial in the defense industry, with rapid advancements in radar systems driving stealth technology innovation. Modern fighter jets benefit from improvements in geometric design, materials, and coatings. Despite the satisfactory performance of current radar-absorbing materials, there is a need for enhancements in corrosion resistance, stability, weight, bandwidth, environmental durability, and production costs. In this thesis, we investigate the radar absorption performance of Titanium Carbide (Ti3C2Tx) and Ti3C2Tx/TiO2 MXene in the X-band. MXenes, discovered in 2011, are two-dimensional nanomaterials known for their electrical conductivity, large surface area, and compatibility with polymers. In the research, titanium aluminum carbide was etched using lithium fluoride and hydrochloric acid to obtain MXene. Additionally, titanium dioxide nanoparticles were grown on MXenes surface at 200°C. Obtained materials were further analyzed using XRD and UV-vis. Due to high conductivity, nano-sized MXenes cannot be used directly as radar absorbers, so they were incorporated into a polyvinyl alcohol (PVA) matrix in weight ratios of 1.7%, 2.4%, 3%, and 4.1%. The permittivity and permeability values of these nanocomposites were measured with a vector network analyzer. Simulation studies were conducted to determine optimal coating thickness and absorption properties at different angles for maximum absorption over a wide bandwidth. The MXene nanocomposites achieved -20 dB (99% absorption) in the X-band at angles of 30°, 60°, and 90° in both horizontal and vertical planes. Additionally, multilayered coating simulations were conducted to obtain wide absorption bandwidth.

Subject Keywords

MXene, Titanium Carbide, Radar Absorber Materials, MXene Nanocomposites, X-band absorption

URI

https://hdl.handle.net/11511/111371

Collections

Graduate School of Natural and Applied Sciences, Thesis