In-situ polymer-derived SiOCnws-Cf/SiC(rGO) composites: a potential candidate for EMI shielding and thermal management

• • Achieved low density of 1.49 g cm−3 and high porosity up to 69.74%, enabling lightweight thermal protection with effective insulation (thermal conductivity 0.211 W m−1 K−1). • • Demonstrated exceptional mechanical robustness: fracture toughness 6.32 MPa m1/2, hardness 7.18 GPa, compressive strength 72.67 MPa, ensuring structural integrity under mechanical stress. • • Provided remarkable EMI shielding effectiveness of 58.31 dB, meeting commercial requirements for sensitive electronics in aerospace. • • Exhibited excellent thermal stability under butane blowtorch ablation at ~1300 °C for 3600 s, validating suitability for hypersonic vehicle thermal protection systems.