Design and synthesis of single phase Hf0.25Zr0.25Ce0.25Y0.125Si0.125O2-δ high-entropy ceramics

被引：11
|
作者：
Liew, Siao Li [1 ]
Zhou, Jun [1 ]
Wei, Fengxia [1 ]
Ni, Xi Ping [1 ]
Tan, Sze Yu [1 ]
Lim, Poh Chong [1 ]
Luai, Meng Tzee [1 ]
Lee, Jing Jun Coryl [1 ]
Yang, Ming [2 ]
Wang, Shijie [1 ]
机构：
[1] ASTAR, Innovis, Inst Mat Res & Engn, 2 Fusionopolis Way, Singapore 138634, Singapore
[2] Hong Kong Polytech Univ, Hung Hom, Kowloon, Dept Appl Phys, Hong Kong, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2022年 / 904卷
关键词：
High-entropy ceramics; Hybrid mixing; Mechanical properties; Thermal properties; YTTRIA-STABILIZED ZIRCONIA; MOLECULAR-DYNAMICS; CONDUCTIVITY; OXIDE; CEO2;
D O I：
10.1016/j.jallcom.2021.164097
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We design and synthesise a new high-entropy ceramic Hf0.25Zr0.25Ce0.25Y0.125Si0.125O2-delta through a hybrid mixing of non-metal and metal atoms. First-principles calculations predict the thermal stability of the single-crystal phase at high temperatures. XRD and EDS mapping confirm a single cubic fluorite phase with a uniform elemental distribution. In-situ high-temperature XRD shows that the phase is stable with no phase separation or secondary phases. The measured mechanical and thermal properties are comparable with reported high-entropy fluorite oxides. Our results add to the compositional space of high-entropy ceramics for a wide range of applications from thermal insulators to electronics. (C) 2022 Elsevier B.V. All rights reserved.
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页数：7
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