Application requirements and challenges of CMC-SiC composites on aero-engine

Abstract

With the increase of the thrust-weight ratio of the aero-engine, CMC-SiC composites with low density, high strength and toughness, high thermal stability, long lifetime, good ablation resistance and oxidation resistance need to be developed to meet the requirements of the complicated and aggressive environments in the aero-engine. The characteristics, fabrication methods, applications on the hot components of the abroad advanced aero-engines, the domestic research achievements and the open problems of the CMC-SiC composites were introduced. The research tendencies in the high performance fibers,parts design and fabrication, environmental barrier coatings,non-destructive testing technologies, evaluation and verification method and repairing technologies were put forward.

Keywords

• aero-engine
• CMC-SiC composite
• hot component
• application