High-entropy ceramics: Present status, challenges, and a look forward

Journal of Advanced Ceramics

Lei Yao¹  Xiwei Qi²  Lei Miao³  Biao Zhao⁴  Yiguang Wang⁵  Guojun Zhang⁶  Jianqiang Li⁷  Yan Xing⁸  Hailong Wang⁹  Yanchun Zhou^1,10  Huimin Xiang^1,10  Fu-zhi Dai^1,10  Lei Su^1,11  Hongjie Wang^1,11 

[1] College of Material Science and Engineering, Shenzhen University, 518060, Shenzhen, China;College of Metallurgy and Energy, North China University of Science and Technology, 063210, Tangshan, China;Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Material, School of Material Science and Engineering, Guilin University of Electronic Technology, 541004, Guilin, China;Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Material Science and Engineering, Zhengzhou University of Aeronautics, 450046, Zhengzhou, China;Institute of Advanced Structure Technology, Beijing Institute of Technology, 100081, Beijing, China;Institute of Functional Material, College of Material Science and Engineering, Donghua University, 201620, Shanghai, China;National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, China;New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing University of Posts and Telecommunications, 210023, Nanjing, China;School of Materials Science and Engineering, Zhengzhou University, 450001, Zhengzhou, China;Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials & Processing Technology, 100076, Beijing, China;State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, 710049, Xi’an, China;

关键词: high-entropy ceramics (HECs);    processing;    structure;    properties;    applications;   

DOI  :  10.1007/s40145-021-0477-y

来源: Springer

【 摘 要 】

High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal elements. Although in the infant stage, the emerging of this new family of materials has brought new opportunities for material design and property tailoring. Distinct from metals, the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon engineering. Aside from strengthening, hardening, and low thermal conductivity that have already been found in high-entropy alloys, new properties like colossal dielectric constant, super ionic conductivity, severe anisotropic thermal expansion coefficient, strong electromagnetic wave absorption, etc., have been discovered in HECs. As a response to the rapid development in this nascent field, this article gives a comprehensive review on the structure features, theoretical methods for stability and property prediction, processing routes, novel properties, and prospective applications of HECs. The challenges on processing, characterization, and property predictions are also emphasized. Finally, future directions for new material exploration, novel processing, fundamental understanding, in-depth characterization, and database assessments are given.

【 授权许可】

CC BY