• • The optimized PCS-1.4-1400 membrane achieves RLmin = −27.12 dB at 2.2 mm and EAB = 8.22 GHz (9.78–18 GHz) at 2.7 mm, exceeding the 8 GHz EAB threshold required for X-band and Ku-band radar absorption; this enables single-layer coatings that cover both bands without thickness escalation.
• • Phase control via 1.4 g PCS and 1400 °C pyrolysis yields a β-SiC/SiOxCy/free-carbon heterostructure; the SiOxCy phase supplies polarization centers while free carbon provides moderate conduction, avoiding the impedance mismatch that occurs when free carbon exceeds the percolation threshold.
• • Electrospinning produces flexible fibrous membranes that retain structural integrity after pyrolysis, addressing the brittleness of monolithic SiC ceramics; this flexibility is critical for conformal coating on curved substrates such as aircraft leading edges and engine nacelles.
• • RCS simulation confirms scattering suppression, validating the membrane as a radar-absorbing coating; the 2.7 mm thickness is compatible with aerospace weight budgets, where conventional metal-based absorbers fail due to high density and oxidation.