Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9

Hanwen Liu; Ling Liu; Huimin Xiang; Fu Zhi Dai; Xiaohui Wang; Muzhang Huang; Chunlei Wan; Zhuang Ma; Yanbo Liu; Hezhang Li; Yanchun Zhou

doi:10.1016/j.jeurceramsoc.2022.03.005

Orthorhombic to tetragonal polymorphic transformation of YTa₃O₉ and its inhibition through the design of high-entropy (Y_0.2La_0.2Ce_0.2Nd_0.2Gd_0.2)Ta₃O₉

Hanwen Liu, Ling Liu^*, Huimin Xiang, Fu Zhi Dai, Xiaohui Wang, Muzhang Huang, Chunlei Wan, Zhuang Ma, Yanbo Liu, Hezhang Li, Yanchun Zhou^*

^*Corresponding author for this work

School of Material Science and Engineering

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

10 Citations (Scopus)

Abstract

To explore the mechanism of phase transformation, YTa₃O₉ was prepared by an integrated one-step synthesis and sintering method at 1500 °C using Y₂O₃ and Ta₂O₅ powders as starting materials. High-temperature XRD patterns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa₃O₉ through the bond length and angle changes at 300–400 °C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y_0.2La_0.2Ce_0.2Nd_0.2Gd_0.2)Ta₃O₉ (HE RETa₃O₉) was designed and synthesized at 1550 °C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa₃O₉, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa₃O₉ exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m·K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa₃O₉ promising as a new thermal barrier coating material.

Original language	English
Pages (from-to)	3559-3569
Number of pages	11
Journal	Journal of the European Ceramic Society
Volume	42
Issue number	8
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2022.03.005
Publication status	Published - Jul 2022

Keywords

High-entropy ceramics (HECs)
Integrated synthesis and sintering
Phase transformation
Rare-earth tantalate
Thermal barrier coatings (TBCs)

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10.1016/j.jeurceramsoc.2022.03.005

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Liu, H., Liu, L., Xiang, H., Dai, F. Z., Wang, X., Huang, M., Wan, C., Ma, Z., Liu, Y., Li, H., & Zhou, Y. (2022). Orthorhombic to tetragonal polymorphic transformation of YTa₃O₉ and its inhibition through the design of high-entropy (Y_0.2La_0.2Ce_0.2Nd_0.2Gd_0.2)Ta₃O₉. Journal of the European Ceramic Society, 42(8), 3559-3569. https://doi.org/10.1016/j.jeurceramsoc.2022.03.005

@article{d82c455a16ea49b9b343c8338ab6c0b6,

title = "Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9",

abstract = "To explore the mechanism of phase transformation, YTa3O9 was prepared by an integrated one-step synthesis and sintering method at 1500 °C using Y2O3 and Ta2O5 powders as starting materials. High-temperature XRD patterns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa3O9 through the bond length and angle changes at 300–400 °C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9 (HE RETa3O9) was designed and synthesized at 1550 °C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa3O9, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa3O9 exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m·K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa3O9 promising as a new thermal barrier coating material.",

keywords = "High-entropy ceramics (HECs), Integrated synthesis and sintering, Phase transformation, Rare-earth tantalate, Thermal barrier coatings (TBCs)",

author = "Hanwen Liu and Ling Liu and Huimin Xiang and Dai, {Fu Zhi} and Xiaohui Wang and Muzhang Huang and Chunlei Wan and Zhuang Ma and Yanbo Liu and Hezhang Li and Yanchun Zhou",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2022",

month = jul,

doi = "10.1016/j.jeurceramsoc.2022.03.005",

language = "English",

volume = "42",

pages = "3559--3569",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier B.V.",

number = "8",

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Liu, H, Liu, L, Xiang, H, Dai, FZ, Wang, X, Huang, M, Wan, C, Ma, Z , Liu, Y , Li, H & Zhou, Y 2022, 'Orthorhombic to tetragonal polymorphic transformation of YTa₃O₉ and its inhibition through the design of high-entropy (Y_0.2La_0.2Ce_0.2Nd_0.2Gd_0.2)Ta₃O₉', Journal of the European Ceramic Society, vol. 42, no. 8, pp. 3559-3569. https://doi.org/10.1016/j.jeurceramsoc.2022.03.005

TY - JOUR

T1 - Orthorhombic to tetragonal polymorphic transformation of YTa3O9 and its inhibition through the design of high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9

AU - Liu, Hanwen

AU - Liu, Ling

AU - Xiang, Huimin

AU - Dai, Fu Zhi

AU - Wang, Xiaohui

AU - Huang, Muzhang

AU - Wan, Chunlei

AU - Ma, Zhuang

AU - Liu, Yanbo

AU - Li, Hezhang

AU - Zhou, Yanchun

PY - 2022/7

Y1 - 2022/7

N2 - To explore the mechanism of phase transformation, YTa3O9 was prepared by an integrated one-step synthesis and sintering method at 1500 °C using Y2O3 and Ta2O5 powders as starting materials. High-temperature XRD patterns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa3O9 through the bond length and angle changes at 300–400 °C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9 (HE RETa3O9) was designed and synthesized at 1550 °C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa3O9, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa3O9 exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m·K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa3O9 promising as a new thermal barrier coating material.

AB - To explore the mechanism of phase transformation, YTa3O9 was prepared by an integrated one-step synthesis and sintering method at 1500 °C using Y2O3 and Ta2O5 powders as starting materials. High-temperature XRD patterns and Raman spectra showed that a phase transformation from orthorhombic to tetragonal took place in YTa3O9 through the bond length and angle changes at 300–400 °C, which caused a thermal conductivity rise. To inhibit the phase transformation, a high-entropy (Y0.2La0.2Ce0.2Nd0.2Gd0.2)Ta3O9 (HE RETa3O9) was designed and synthesized at 1550 °C using the integrated solid-state synthesis and sintering method. In tetragonal structured HE RETa3O9, phase transformation was inhibited by the high-entropy effect. Furthermore, HE RETa3O9 exhibited low thermal conductivity, and its tendency to increase with temperature was alleviated (1.69 W/m·K, 1073 K). Good phase stability, low thermal conductivity and comparable fracture toughness to YSZ make HE RETa3O9 promising as a new thermal barrier coating material.

KW - High-entropy ceramics (HECs)

KW - Integrated synthesis and sintering

KW - Phase transformation

KW - Rare-earth tantalate

KW - Thermal barrier coatings (TBCs)

UR - http://www.scopus.com/inward/record.url?scp=85126137120&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2022.03.005

DO - 10.1016/j.jeurceramsoc.2022.03.005

M3 - Article

AN - SCOPUS:85126137120

SN - 0955-2219

VL - 42

SP - 3559

EP - 3569

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 8

ER -

Orthorhombic to tetragonal polymorphic transformation of YTa₃O₉ and its inhibition through the design of high-entropy (Y_0.2La_0.2Ce_0.2Nd_0.2Gd_0.2)Ta₃O₉

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