With the development of the aerospace industry,the performance of structural materials has become more and more essential for hypersonic flight technology.New thermal protection materials represented by high-entropy ceramics have become one of the research hotspots in the field of ceramics in recent years due to their excellent properties such as high fracture toughness,high temperature resistance and corrosion resistance.It has been successfully applied in aero engine thermal structure components,aircraft thermal protection system and other fields.High-entropy ceramic materials usually refer to the multi-principal solid solution formed by five or more ceramic components,which can be divided into high-entropy oxide ceramics and high-entropy non-oxide ceramics according to their chemical composition.The research progress of high-entropy oxide ceramics and high-entropy non-oxide ceramics is reviewed,and the preparation methods such as discharge plasma sintering and liquid phase precursor are emphatically analyzed.The mechanical and thermal properties of high-entropy ceramic materials are approached by examining densification,phase composition and sintering temperature by analyzing the microstructure diagram of high-entropy ceramic materials.The application direction of high entropy ceramic materials in energy,materials and aerospace fields is prospected,so as to provide reference for further research of high-entropy ceramic materials in the future.
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