稀土钽酸盐(RETaO4)高熵陶瓷的制备与热学性能研究

Jiatong Zhu; Zhihao Lou; Ping Zhang; Jia Zhao; Xuanyu Meng; Jie Xu; Feng Gao

doi:10.15541/jim20200426

稀土钽酸盐(RETaO₄)高熵陶瓷的制备与热学性能研究

Translated title of the contribution: Preparation and Thermal Properties of Rare Earth Tantalates (RETaO₄) High-entropy Ceramics

Jiatong Zhu, Zhihao Lou, Ping Zhang, Jia Zhao, Xuanyu Meng, Jie Xu, Feng Gao

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

35 Scopus citations

Abstract

Single-phase solid solution monoclinic structure high-entropy tantalates (Nd_1/6Sm_1/6Eu_1/6Gd_1/6Dy_1/6Ho_1/6) TaO₄(6RETaO₄), (Nd_1/5Sm_1/5Eu_1/5Gd_1/5Dy_1/5)TaO₄(5RETaO₄), (Nd_1/4Sm_1/4Eu_1/4Gd_1/4)TaO₄(4RETaO₄) were prepared by solid state method. STEM-EDS result shows the rare earth elements are uniformly distributed without segregation. The ferroelastic domain observed through SEM derived from the second ferroelastic phase transition. The thermal expansion experiment suggests the good thermal stability below 1200℃, where the thermal expansion coefficient of 6RETaO₄ reaches 9.25×10^-6 K^-1 at 1200℃. Due to the increase of phonon scattering derived from high-entropy effect, RETaO₄ ceramics exhibit lower intrinsic thermal conductivity (2.98-1.23 W•m^-1•K^-1, 100-1000℃) and enhanced mechanical properties (6RETaO₄, (9.97±2.2) GPa), which indicates that it is a potential material for thermal barrier coatings.

Translated title of the contribution	Preparation and Thermal Properties of Rare Earth Tantalates (RETaO₄) High-entropy Ceramics
Original language	Chinese (Traditional)
Pages (from-to)	411-417
Number of pages	7
Journal	Wuji Cailiao Xuebao/Journal of Inorganic Materials
Volume	36
Issue number	4
DOIs	https://doi.org/10.15541/jim20200426
State	Published - Apr 2021

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@article{99e799d64f8644e9bbccec98a97e7c49,

title = "稀土钽酸盐(RETaO4)高熵陶瓷的制备与热学性能研究",

abstract = "Single-phase solid solution monoclinic structure high-entropy tantalates (Nd1/6Sm1/6Eu1/6Gd1/6Dy1/6Ho1/6) TaO4(6RETaO4), (Nd1/5Sm1/5Eu1/5Gd1/5Dy1/5)TaO4(5RETaO4), (Nd1/4Sm1/4Eu1/4Gd1/4)TaO4(4RETaO4) were prepared by solid state method. STEM-EDS result shows the rare earth elements are uniformly distributed without segregation. The ferroelastic domain observed through SEM derived from the second ferroelastic phase transition. The thermal expansion experiment suggests the good thermal stability below 1200℃, where the thermal expansion coefficient of 6RETaO4 reaches 9.25×10-6 K-1 at 1200℃. Due to the increase of phonon scattering derived from high-entropy effect, RETaO4 ceramics exhibit lower intrinsic thermal conductivity (2.98-1.23 W•m-1•K-1, 100-1000℃) and enhanced mechanical properties (6RETaO4, (9.97±2.2) GPa), which indicates that it is a potential material for thermal barrier coatings.",

keywords = "High-entropy ceramics, Rare earth tantalate, Thermal barrier coating, Thermal property",

author = "Jiatong Zhu and Zhihao Lou and Ping Zhang and Jia Zhao and Xuanyu Meng and Jie Xu and Feng Gao",

year = "2021",

month = apr,

doi = "10.15541/jim20200426",

language = "繁体中文",

volume = "36",

pages = "411--417",

journal = "Wuji Cailiao Xuebao/Journal of Inorganic Materials",

issn = "1000-324X",

publisher = "Science Press ",

number = "4",

}

TY - JOUR

T1 - 稀土钽酸盐(RETaO4)高熵陶瓷的制备与热学性能研究

AU - Zhu, Jiatong

AU - Lou, Zhihao

AU - Zhang, Ping

AU - Zhao, Jia

AU - Meng, Xuanyu

AU - Xu, Jie

AU - Gao, Feng

PY - 2021/4

Y1 - 2021/4

N2 - Single-phase solid solution monoclinic structure high-entropy tantalates (Nd1/6Sm1/6Eu1/6Gd1/6Dy1/6Ho1/6) TaO4(6RETaO4), (Nd1/5Sm1/5Eu1/5Gd1/5Dy1/5)TaO4(5RETaO4), (Nd1/4Sm1/4Eu1/4Gd1/4)TaO4(4RETaO4) were prepared by solid state method. STEM-EDS result shows the rare earth elements are uniformly distributed without segregation. The ferroelastic domain observed through SEM derived from the second ferroelastic phase transition. The thermal expansion experiment suggests the good thermal stability below 1200℃, where the thermal expansion coefficient of 6RETaO4 reaches 9.25×10-6 K-1 at 1200℃. Due to the increase of phonon scattering derived from high-entropy effect, RETaO4 ceramics exhibit lower intrinsic thermal conductivity (2.98-1.23 W•m-1•K-1, 100-1000℃) and enhanced mechanical properties (6RETaO4, (9.97±2.2) GPa), which indicates that it is a potential material for thermal barrier coatings.

AB - Single-phase solid solution monoclinic structure high-entropy tantalates (Nd1/6Sm1/6Eu1/6Gd1/6Dy1/6Ho1/6) TaO4(6RETaO4), (Nd1/5Sm1/5Eu1/5Gd1/5Dy1/5)TaO4(5RETaO4), (Nd1/4Sm1/4Eu1/4Gd1/4)TaO4(4RETaO4) were prepared by solid state method. STEM-EDS result shows the rare earth elements are uniformly distributed without segregation. The ferroelastic domain observed through SEM derived from the second ferroelastic phase transition. The thermal expansion experiment suggests the good thermal stability below 1200℃, where the thermal expansion coefficient of 6RETaO4 reaches 9.25×10-6 K-1 at 1200℃. Due to the increase of phonon scattering derived from high-entropy effect, RETaO4 ceramics exhibit lower intrinsic thermal conductivity (2.98-1.23 W•m-1•K-1, 100-1000℃) and enhanced mechanical properties (6RETaO4, (9.97±2.2) GPa), which indicates that it is a potential material for thermal barrier coatings.

KW - High-entropy ceramics

KW - Rare earth tantalate

KW - Thermal barrier coating

KW - Thermal property

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U2 - 10.15541/jim20200426

DO - 10.15541/jim20200426

M3 - 文章

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JO - Wuji Cailiao Xuebao/Journal of Inorganic Materials

JF - Wuji Cailiao Xuebao/Journal of Inorganic Materials

IS - 4

ER -

稀土钽酸盐(RETaO₄)高熵陶瓷的制备与热学性能研究

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