ABSTRACT
High entropy alloys belong to a class of new materials which possess outstanding physical properties due to the mixing of at least five constituent elements. In addition, such materials have simple crystal structures (in the general bcc or amorphous phase) which are very stable at elevated temperatures. Extensive research has been carried out on interstitial high entropy alloys (nitrogen, carbon, oxygen, and boron) with superior mechanical, physical, and chemical properties. Special attention is paid to the development of nitride films and coatings based on high entropy alloys with different intrinsic architecture. This chapter will focus on different methods of deposition, space composition, structural-phase state, microstructure, and physico-mechanical properties of high entropy nitrides. Summarizing the relationship between microstructures and properties allows expanding compositional opportunities for designing new materials with unique properties, which will satisfy the requirements of modern material sciences. This review will also consider future directions and ideas for the development of the new high entropy nitrides.
