Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic

Dawei Zhang; Yan Chen; Tianshi Feng; Dunji Yu; Ke An; Renkun Chen; Jian Luo

doi:10.1016/j.scriptamat.2022.114699

Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic

Dawei Zhang, Yan Chen, Tianshi Feng, Dunji Yu, Ke An, Renkun Chen, Jian Luo

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

This study discovers a reversible order-disorder transition (ODT) in a 10-component compositionally complex ceramic, (Nd_0.15Pr_0.15Dy_0.8Ho_0.8Er_0.8Ti_0.2Yb_0.1Hf_0.1Zr_0.1Nb_0.8)O_7-δ, induced via annealing in oxidized vs. 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 pyrochlore vs. fluorite structure that can be quenched. In-situ neutron 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.

Original language	English
Article number	114699
Journal	Scripta Materialia
Volume	215
DOIs	https://doi.org/10.1016/j.scriptamat.2022.114699
State	Published - Jul 1 2022

Funding

The work is supported by the National Science Foundation (NSF) in the Ceramics program via Grant No. DMR-2026193. A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the ORNL. The FIB and STEM work utilized the shared facilities at the San Diego Nanotechnology Infrastructure of UCSD, a member of the National Nanotechnology Coordinated Infrastructure (supported by the NSF ECCS-1542148) and the Irvine Materials Research Institute (through UCI CCAM, partially supported by NSF DMR-2011967). The work is supported by the National Science Foundation (NSF) in the Ceramics program via Grant No. DMR-2026193 . A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the ORNL. The FIB and STEM work utilized the shared facilities at the San Diego Nanotechnology Infrastructure of UCSD, a member of the National Nanotechnology Coordinated Infrastructure (supported by the NSF ECCS-1542148 ) and the Irvine Materials Research Institute (through UCI CCAM, partially supported by NSF DMR-2011967 ).

Keywords

Compositionally complex ceramic
Fluorite
High-entropy oxide
Order-disorder transition
Redox phase transition

Access to Document

10.1016/j.scriptamat.2022.114699

Cite this

@article{925f2174d2934685b375ad8ca30bd1e7,

title = "Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic",

abstract = "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 oxidized vs. 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 pyrochlore vs. fluorite structure that can be quenched. In-situ neutron 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.",

keywords = "Compositionally complex ceramic, Fluorite, High-entropy oxide, Order-disorder transition, Redox phase transition",

author = "Dawei Zhang and Yan Chen and Tianshi Feng and Dunji Yu and Ke An and Renkun Chen and Jian Luo",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s)",

year = "2022",

month = jul,

day = "1",

doi = "10.1016/j.scriptamat.2022.114699",

language = "English",

volume = "215",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Elsevier",

}

TY - JOUR

T1 - Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic

AU - Zhang, Dawei

AU - Chen, Yan

AU - Feng, Tianshi

AU - Yu, Dunji

AU - An, Ke

AU - Chen, Renkun

AU - Luo, Jian

PY - 2022/7/1

Y1 - 2022/7/1

N2 - 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 oxidized vs. 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 pyrochlore vs. fluorite structure that can be quenched. In-situ neutron 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.

AB - 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 oxidized vs. 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 pyrochlore vs. fluorite structure that can be quenched. In-situ neutron 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.

KW - Compositionally complex ceramic

KW - Fluorite

KW - High-entropy oxide

KW - Order-disorder transition

KW - Redox phase transition

UR - http://www.scopus.com/inward/record.url?scp=85127200948&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2022.114699

DO - 10.1016/j.scriptamat.2022.114699

M3 - Article

AN - SCOPUS:85127200948

SN - 1359-6462

VL - 215

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 114699

ER -

Discovery of a reversible redox-induced order-disorder transition in a 10-component compositionally complex ceramic

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this