Abstract:With the development of aero-engines towards high efficiency and high thrust-to-weight ratio, the traditional nickel-based high-temperature alloys are approaching their service temperature limit, and the introduction of new material systems is a matter of urgency. Ceramic matrix composites (CMCs), with their lightweight, high strength, and high-temperature stability, have become the ideal material for the hot end of nextgeneration aero engines. However, in the harsh service environment, ceramic matrix composites face the threat of CMAS molten salt scouring effect and high-temperature hydroxide corrosion and need to prepare Environmental Barrier Coating (EBC) on their surface to improve their corrosion resistance. The third-generation EBC system with silicate as the surface layer is a hot topic of research at present. This paper summarizes the EBC coating design requirements and briefly introduces the development history of the first two generations of EBC based on a detailed introduction of the development status of the third-generation EBC system, and looks forward to the future development direction of EBC in conjunction with existing research reports to provide a reference for theselection of materials for advanced aero engines.