In situ construction of CNWs/SiC-NWs hybrid network reinforced SiCN with excellent electromagnetic wave absorption properties in X band

Enhanced Electromagnetic Wave Absorption for Y2O3-Doped SiBCN Ceramics

“…Figure summarizes the typical PDCs in terms of RL min and EAB values reported in the recent literature studies. ,,,,,− It can be seen that the PDCs are widely used as EMW absorbers. The main ways to improve the absorption capability of EMWs are adding dielectric loss phases and conduction loss phases.…”

“…Therefore, the PDCs have excellent EMW absorption properties owing to the polarization loss and conductivity loss. To further improve the EMW absorption performance of the PDCs, there are mainly two ways: one is to add a transition-metal catalyst to generate crystalline phases, , and the other is to add conductive and/or dielectric phases as the second phase (CNTs, RGO, CNWs, and ZrB 2 ). − For example, Jia et al added nano-ZrB 2 into SiC to enhance the interface polarization and induced current, and the minimum reflection loss (RL min ) reached −29.3 dB. Ren et al added CNWs/SiC to the SiCN ceramics, which greatly increased the polarization loss phase and the conductive network in the material, the RL min was −21.6 dB, and the effective absorption bandwidth (EAB) was 4.2 GHz.…”

“…To further improve the EMW absorption performance of the PDCs, there are mainly two ways: one is to add a transition-metal catalyst to generate crystalline phases, , and the other is to add conductive and/or dielectric phases as the second phase (CNTs, RGO, CNWs, and ZrB 2 ). − For example, Jia et al added nano-ZrB 2 into SiC to enhance the interface polarization and induced current, and the minimum reflection loss (RL min ) reached −29.3 dB. Ren et al added CNWs/SiC to the SiCN ceramics, which greatly increased the polarization loss phase and the conductive network in the material, the RL min was −21.6 dB, and the effective absorption bandwidth (EAB) was 4.2 GHz. Li et al used ferrocene as a catalyst to generate SiC crystals in the SiBCN ceramics, forming SiC-graphite-Si 3 N 4 and other multiple heterojunctions, for which the RL min and EAB reached −34.28 dB and 3.76 GHz, respectively.…”

SiC Nanowire–Si3N4 Nanobelt Interlocking Interfacial Enhancement of Carbon Fiber Composites with Boosting Mechanical and Frictional Properties

“…Architecture design and optimization through the introduction of nanofillers into CC is an effective way to improve microstructure defects. This has been well exemplified by some nanofillers, such as carbon nanotubes (CNTs), carbon nanofibers (CNFs), silicon carbide nanowires (SiCnws), silicon nitride nanowires (Si 3 N 4 nws), and silicon nitride nanobelts (Si 3 N 4 nbs). − In these cases, the incorporation of the nanofillers could not only achieve nanoscale reinforcement for CC by the virtue of their nanosize but also favor PyC deposition by their high specific surface areas. − Accordingly, effective load transfer and good interfacial adhesion are achieved to perfect the resulting composites. However, the existing literature demonstrates that only a limited improvement of mechanical strength has been achieved by introducing single-component nanofillers.…”

Innovative Method Using Adhesive Force for Surface Micromachining of Carbon Nanowall

“…Graphite-related materials, such as graphene, carbon nanotubes (CNTs), and carbon nanowalls (CNWs) have continuously attracted interest in many fields [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. A wall-shaped CNW is based on graphene sheets standing vertically, to which electrons or desired materials can attach to on both sides because CNWs have a lamella structure and the largest reaction area among these materials.…”