Fig 1

(a) Schematic illustration of the fabrication process for the SiC@CoSe2−x nanocomposite; (b–d) SEM images of bamboo-like bare SiC nanowires at different magnifications; (e–g) SEM images of SiC@Co3O4 nanocomposites at different magnifications; (h) Cross-sectional SEM image of the SiC@Co3O4 nanocomposite; (i, j) Photographs of the Monkey Tail Cactus in nature; (k) Schematic illustration of the growth process of Co3O4 nanoneedles on the bamboo-like SiC nanostructure surface."

Fig 2

(a–c) SEM images of SiC@CoSe2 nanocomposites at different magnifications; (d–f) SEM images of SiC@CoSe2−x nanocomposites at different magnifications; (g) Typical TEM image of SiC@CoSe2−x nanocomposite; (h–j) HRTEM images of the CoSe2−x product taken from different regions."

Fig 3

(a) XRD patterns of SiC nanowires, SiC@Co3O4, SiC@CoSe2, and SiC@CoSe2−x nanocomposites; (b) Schematic illustration of the structure of SiC@CoSe2 nanocomposite; (c) Raman spectra of SiC@CoSe2 and SiC@CoSe2−x nanocomposites; (d) XPS survey spectra (e) Se 3d, and (f) Co 2p spectra of SiC@CoSe2 and SiC@CoSe2−x nanocomposites; (g) EPR spectrum of SiC@CoSe2−x nanocomposite."

Fig 4

(a) RL contour plots of SiC nanowires, (b) SiC@Co3O4, (c) SiC@CoSe2, and (d) SiC@CoSe2−x nanocomposites; (e) Comparison of the RLmin and EAB for each sample; (f) Radar chart of microwave absorption performance for all samples; (g) RLmin performance of each sample at different matching thicknesses; (h) Comparison of the EAB of the optimized SiC@CoSe2−x nanocomposite with previously reported results."

Fig 5

(a) Simulation of the aircraft stealth effect in a real environment; (b) Schematic diagram of the CST model; (c) 3D simulation image of the PEC plate; (d) 3D simulation image of the RCS for the SiC@CoSe2−x material; (e) Simulated RCS images for the PEC plate and SiC@CoSe2−x material; (f) Simulated RCS for the PEC plate and the four materials at different angles."

Fig 6

(a) Frequency dependence of the real part of the permittivity; (b) Frequency dependence of the imaginary part of the permittivity; (c) Frequency dependence of the dielectric loss for SiC nanowires, SiC@Co3O4, SiC@CoSe2, and SiC@CoSe2−x nanocomposites; (d) Contour plot of Δ for the SiC@CoSe2 sample; (e) Contour plot of Δ for the SiC@CoSe2−x sample; (f) Attenuation coefficient curves for all samples; (g) Cole-Cole plots for the SiC@CoSe2 sample; (h) Cole-Cole plots for the SiC@CoSe2−x sample; (i, j) Frequency dependence of conductive loss and polarization loss for different samples; (k, l) Schematic illustration of the electromagnetic attenuation mechanism for the SiC@CoSe2−x sample."