Research Progress on Joining Technology of Ceramic Matrix Composites for Aerospace Engines

The continuous advancement of aero-engine technology has placed increasingly stringent demands on high-temperature structural materials. Ceramic matrix composites(CMCs) have become one of the key materials for hot-section components in next-generation aero-engines, owing to their excellent high-temperature performance, low density,and remarkable creep resistance. However, the engineering application of CMCs faces a core challenge in joining technology,constrained by the limitations of direct forming processes for large-scale CMCs with complex geometries and the requirement for structural-functional integration through heterogeneous material combinations. The characteristics and challenges of mechanical joining and welding techniques for CMCs were analyzed, and the problems and process measures of ceramic matrix composites in connection technology were discussed. Finally, the connection technology of ceramic matrix composites was further discussed from the aspects of optimization, exploration of new process and new technologies.