Research Progress of Non-oxide and High Entropy Ceramic Coatings

Ceramic coatings play a key role in extending the service life of materials in aerospace and energy fields by protecting materials from high temperature, oxidation, corrosion and thermal stress. Non-oxide and high entropy ceramics are new emerging coating materials which have been researched and developed in recent years. Compared with traditional oxide ceramics, non-oxide ceramics have better high temperature stability, oxidation resistance and erosion resistance. These characteristics make non-oxide ceramics perform well in extreme environments. It is particularly noteworthy that the non-oxide high entropy ceramic is a uniform solid solution composed of at least four or five atoms. Their unique structure and outstanding properties show great potential application in the field of coating. In this paper, the researches about regulating microstructure, preparation technology and properties of nitride and its high entropy system, carbide and its high entropy system and boride and its high entropy system in coating field are summarized, and their future development and prospects are prospected.