Research Progress of High-Entropy Ceramic Films and Coatings

High-entropy ceramics with five or more cations have attracted great attention due to their excellent properties in various structural and functional applications. After the introduction of the concept of entropic stability, significant efforts have been made to increase the entropy, minimize the Gibbs free energy, and achieve stable single-phase high-entropy ceramics. This paper reviewed the recent research progress on high-entropy ceramic films and coatings. Firstly, the microstructure of high-entropy ceramic films and coatings was introduced from the concept of high entropy; then, the preparation methods of high-entropy ceramic films and coatings were outlined, and the research results on their excellent properties were summarized; finally, the prospects of high-entropy ceramic films and coatings were presented.