Oxidation resistance and thermal cycling properties of the SiCnws-SiC coating on the C/SiC composites

SiC coatings reinforced with SiC nanowires were prepared on carbon/silicon carbide (C/SiC) composites through chemical vapor reaction route and chemical vapor deposition (CVD). The SiC nanowires were introduced to mainly improve the interface bonding properties of the coating and C/SiC composites. The microstructure, phase composition, thermal cycling, and bonding strength of the SiCnws-SiC coating were investigated. After nine thermal cycles, the weight loss of the SiCnws-SiC-coated C/SiC composites was only 4.6 wt.%. Tensile test results show that the tensile strength of the SiCnws-SiC-coated C/SiC composites was more than 4.5-4.6 MPa. The introduction of SiC nanowires effectively improved interface bonding strength, thus enhancing the thermal cycling and mechanical properties of the coating.

Automated summary

SiC coatings reinforced with SiC nanowires were prepared on C/SiC composites. The introduction of SiC nanowires effectively improved the interface bonding strength, enhancing the thermal cycling and mechanical properties of the coating.