Lattice distortion and stability of (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O high-entropy oxide under high pressure

被引：32

作者：

Cheng, B. ^{[1
,2
]}

Lou, H. ^{[1
]}

Sarkar, A. ^{[4
,5
,6
]}

Zeng, Z. ^{[1
]}

Zhang, F. ^{[1
]}

Chen, X. ^{[1
]}

Tan, L. ^{[1
]}

Glazyrin, K. ^{[7
]}

Liermann, H. -P. ^{[7
]}

Yan, J. ^{[8
,9
]}

Wang, L. ^{[10
]}

Djenadic, R. ^{[4
,5
,11
]}

Hahn, H. ^{[4
,5
,6
]}

Zeng, Q. ^{[1
,3
]}

机构：

[1] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China

[2] Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China

[3] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Adv Metall Mat, Nanjing 211189, Peoples R China

[4] Tech Univ Darmstadt, Joint Res Lab Nanomat, D-64287 Darmstadt, Germany

[5] Karlsruhe Inst Technol, D-64287 Darmstadt, Germany

[6] Karlsruhe Inst Technol, Inst Nanotechnol, D-76344 Eggenstein Leopoldshafen, Germany

[7] Deutsch Elektronen Synchrotron DESY, Photon Sci, Hamburg, Germany

[8] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[9] Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA

[10] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[11] Heraeus Deutschland GmbH & Co KG, Heraeusstr 12-14, D-63450 Hanau, Germany

来源：

MATERIALS TODAY ADVANCES | 2020年 / 8卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Phase transition; Synchrotron x-ray diffraction; Pair distribution function; Nanocrystalline; INDUCED PHASE-TRANSITIONS; X-RAY-DIFFRACTION; RARE-EARTH; ALLOY; TRANSFORMATION;

D O I：

10.1016/j.mtadv.2020.100102

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-entropy oxides (HEOs) stabilize multiple cations in a single solid solution phase, providing a new opportunity for property engineering in almost infinite compositional space. The structural stability and tunability of HEO are of great interest and importance but has not been well understood, especially under pressure. Here, we studied the structure evolution of a rock salt phase (Co0.2Cu0.2Mg0.2Ni0.2Zn0.2)O HEO using in situ synchrotron X-ray diffraction, pair distribution function, Raman spectroscopy up to similar to 43 GPa, and ex situ transmission electron microscopy, a pressure-induced reversible rock salt to highly distorted cubic phase transition was observed. These results suggest highly tunable lattice distortion in HEOs under pressure, which could promote the fundamental understanding and also guide applications of HEOs. (C) 2020 The Author(s). Published by Elsevier Ltd.

引用

页数：10

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