Design and synthesis of single phase Hf0.25Zr0.25Ce0.25Y0.125Si0.125O2-δ high-entropy ceramics
Lim P.C. 1Liew S.L. 1Zhou J. 1Wei F. 1Ni X.P. 1Tan S.Y. 1Lee J.J.C. 1Wang S. 1Yang M. 2Luai M.T.1
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作者信息
1. Institute of Materials Research & Engineering A?STAR (Agency for Science Technology and Research)
2. Department of Applied Physics The Hong Kong Polytechnic University
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Abstract
? 2022 Elsevier B.V.We design and synthesise a new high-entropy ceramic Hf0.25Zr0.25Ce0.25Y0.125Si0.125O2-δ 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.
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