Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (4): 339-346.DOI: 10.15541/jim20200611

Special Issue: 【结构材料】热障与环境障涂层 【结构材料】高熵陶瓷

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High Entropy Engineering: New Strategy for the Critical Property Optimizations of Rare Earth Silicates

SUN Luchao1(), REN Xiaomin1,2, DU Tiefeng1, LUO Yixiu1, ZHANG Jie1, WANG Jingyang1()   

  1. 1. Advanced Ceramics and Composites Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
    2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  • Received:2020-10-27 Revised:2020-12-14 Published:2021-04-20 Online:2020-12-10
  • Contact: WANG Jingyang, professor. E-mail:
  • About author:SUN Luchao(1984-), male, associate professor. E-mail:
  • Supported by:
    National Science and Technology Major Project(2017-VI-0020-0093);National Natural Science Foundation of China(51772302);International Cooperation Key Program(174321KYSB20180008);Natural Science Foundation of Liaoning Province(2020-MS-006)


Environmental barrier coatings (EBCs) have been developed to improve the durability of SiCf/SiC CMC components against harsh combustion environment. Among the most promising EBC candidates, rare-earth (RE) silicates attract attentions for their low thermal expansion coefficient, excellent high temperature water vaper and CMAS corrosion resistance, and good thermal and chemical compatibility with silicon-based ceramics and composites. Herein, we reviewed the optimizations of critical key properties of rare-earth silicates through strategic high entropy design to modify the current performance deficiencies of rare-earth silicates like thermal properties (coefficient of thermal expansion and thermal conductivity), CMAS corrosion resistance and high temperature phase stability. The present advancements demonstrate the merits of high entropy engineering for advanced EBCs for the improvement of crucial properties in engine applications.

Key words: high entropy engineering, high entropy ceramics, rare earth silicate, environmental barrier coatings, review

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