3D printed porous biomass–derived SiCnw/SiC composite for structure–function integrated electromagnetic absorption

Ceramic-based absorbing composite is irreplaceable in high-temperature conditions. This work has fabricated a novel biomass–derived porous SiCnw/SiC for structure–function integrated electromagnetic wave (EMW) absorption through selective laser sintering (SLS) 3D printing and carbothermal reduction. SLS processed the biomass-derived wood precursor with unique microstructures. The properties were controlled by changing SiO reduction temperatures, which facilitated growth of SiC nanowires effective EMW absorption. printed shows efficient abilities minimum reflection loss −49.01 dB an bandwidth 5.1 GHz. bulk density flexural strength are respectively 0.73 ± 0.001 g/cm3 6.21 0.66 MPa. Despite high open porosity 75.58 0.31%, demonstrates excellent thermal conductivities 3.21∼4.99 W/(m·K) superior fire-resistant ability. integrates structure functions, indicating wide applications specific harsh environments.