RT Journal Article A1 Dewei NI,Yuan CHENG,Jiaping ZHANG,Ji-Xuan LIU,Ji ZOU,Bowen CHEN,Haoyang WU,Hejun LI,Shaoming DONG,Jiecai HAN,Xinghong ZHANG,Qiangang FU,Guo-Jun ZHANG; AD 上海陶瓷研究所高性能陶瓷与超微细结构、结构陶瓷与复合材料工程研究中心国家重点实验室, 中国 ; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, 中国 ; University of Chinese Academy of Sciences, 100049, 中国 ; 上海陶瓷研究所高性能陶瓷与超微细结构、结构陶瓷与复合材料工程研究中心国家重点实验室, 中国 ; 上海陶瓷研究所高性能陶瓷与超微细结构、结构陶瓷与复合材料工程研究中心国家重点实验室, 中国 ; State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, 中国 T1 Advances in ultra-high temperature ceramics, composites, and coatings YR 2022 IS 1 vo 11 OP 1-OP 56 K1 composites;coatings;ultra-high temperature ceramics (UHTCs);high-entropy ultra-high temperature ceramics AB Ultra-high temperature ceramics (UHTCs) are generally referred to the carbides, nitrides, and borides of the transition metals, with the Group IVB compounds (Zr & Hf) and TaC as the main focus. The UHTCs are endowed with ultra-high melting points, excellent mechanical properties, and ablation resistance at elevated temperatures. These unique combinations of properties make them promising materials for extremely environmental structural applications in rocket and hypersonic vehicles, particularly nozzles, leading edges, and engine components, etc. In addition to bulk UHTCs, UHTC coatings and fiber reinforced UHTC composites are extensively developed and applied to avoid the intrinsic brittleness and poor thermal shock resistance of bulk ceramics. Recently, high- entropy UHTCs are developed rapidly and attract a lot of attention as an emerging direction for ultra-high temperature materials. This review presents the state of the art of processing approaches, microstructure design and properties of UHTCs from bulk materials to composites and coatings, as well as the future directions. SN 2226-4108 LA EN