Progress on self-healing silicon carbide ceramic matrix composites and its applications

Continuous fiber reinforced silicon carbide ceramic matrix composites were developing towards possessing self-healing properties for the need of high thrust mass ratio aerospace-engine working in thermal oxidizing environment. The microstructure and properties of a self-healing silicon carbide matrix composite were introduced. The mechanism of toughness and stiffness of the composite and the self-healing behaviors were commented. The application progress of self-healing silicon carbide component was summarized. Manufacturing method and technique feature were reviewed. Multi-component and multi-layer microstructure was the key point for this composite possessing self-healing and toughing properties, and oxidation resistant system which exhausted O₂ and sealed crack in each layer. This self-healing silicon carbide matrix composite could not only meet the requirements of for aerospace-engine service but decrease weight remarkably, increased thrust-weight ratio in return.