Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic
Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic
复制标题
DOI：
10.1016/j.scriptamat.2022.114699
复制
发表时间：
2022-07
影响因子：
6
通讯作者：
Dawei Zhang;Yan Chen;Tianshi Feng;Dunji Yu;Ke An;Renkun Chen;Jian Luo
中科院分区：
文献类型：
--
作者：
Dawei Zhang;Yan Chen;Tianshi Feng;Dunji Yu;Ke An;Renkun Chen;Jian Luo
研究发现，在1600 °C氧化与还原环境中，退火诱导10组分复杂陶瓷（Nd0.15Pr0.15Dy0.8Ho0.8Er0.8Ti0.2Yb0.1Hf0.1Zr0.1Nb0.8）O 7-δ发生可逆有序-无序转变。值得注意的是，10-阳离子氧化物仍然是一个均匀的单相高熵的固溶体之前和之后的pyroxysterrevs.萤石结构，可以quenched. In-原位中子衍射揭示了氧空位的形成和原子位移在此ODT。这项研究揭示了一种新的途径，通过氧化还原转变来诱导ODT，以定制组成复杂的萤石基氧化物的性质。
This study discovers a reversible order-disorder transition (ODT) in a 10-component compositionally complex ceramic, (Nd0.15Pr0.15Dy0.8Ho0.8Er0.8Ti0.2Yb0.1Hf0.1Zr0.1Nb0.8)O7-δ, induced via annealing in oxidizedvs.reduced environments at 1600 °C. Notably, the 10-cation oxide remains a homogenous single-phase high-entropy solid solution before and after the ODT in the pyrochlorevs.fluorite structure that can be quenched.In-situneutron diffraction reveals the oxygen vacancy formation and atomic displacement during this ODT. This study reveals a new pathway to induce ODT via a redox transition to tailor the properties of compositionally complex fluorite-based oxides.