Enhanced mechanical and thermal properties of ferroelastic high-entropy rare-earth-niobates

被引：60

作者：

Zhu, Jiatong ^{[1
]}

Xu, Jie ^{[1
,2
,3
]}

Zhang, Ping ^{[1
]}

Meng, Xuanyu ^{[1
]}

Cao, Shuyao ^{[1
]}

Wu, Jiamin ^{[3
]}

Wei, Mingyue ^{[1
]}

Shi, Yusheng ^{[3
]}

Reece, Michael J. ^{[2
,4
]}

Gao, Feng ^{[1
,2
]}

机构：

[1] Northwestern Polytech Univ, Sch Mat Sci & Engn, MIIT Key Lab Radiat Detect Mat & Devices, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Northwestern Polytech Univ, NPU QMUL Joint Res Inst Adv Mat & Struct, Xian 710072, Peoples R China

[3] Huazhong Univ Sci Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China

[4] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

来源：

SCRIPTA MATERIALIA | 2021年 / 200卷

基金：

中国国家自然科学基金;

关键词：

High-entropy ceramics; RENbO4; Ferroelastic domain; Ductility; Thermal conductivity; BARRIER; LANBO4; GD; SM; DY;

D O I：

10.1016/j.scriptamat.2021.113912

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel class of high-entropy rare-earth-niobates (RENbO4) was synthesized via solid-state reaction method. The XRD Rietveld refinement, Raman, and SEM-EDS results implied that the uniform doped element distribution. Unique ferroelastic domain structure formed by t-m phase transition brings the excellent ductility for RENbO4 ceramics (Poisson's ratios > 0.3), where 7RENbO(4) exhibits enhanced mechanical properties (Hv = 4.96 +/- 0.08 GPa, K-IC= 2.05 +/- 0.14 MPa.m(0.5)). Moreover, due to the lattice distortion derived from high-entropy effects, high-entropy rare-earth-niobates present lower thermal conductivity (6RENbO(4), 2.30-1.40 W m(-1) K-1, 100-1000 degrees C) and higher thermal expansion coefficients (5RENbO(4), 9.03 x 10(-6) K-1, 719 degrees C). These moderate properties indicate a potential materials design for TBCs application. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：6

共 50 条

[31] Effect of multi-component at the A site on the thermophysical properties of high entropy niobates [J].

Wang, Panpan ;

Wang, Jing ;

Cai, Huangyue ;

Shan, Xiao ;

Zhang, Han ;

Ren, Guoliang ;

He, Junjie ;

Luo, Lirong ;

Zhao, Xiaofeng .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2024, 44 (05) :2954-2964

[32] Thermophysical and mechanical properties of dual-phase medium- and high-entropy rare-earth zirconate ceramics [J].

Fan, Wei ;

Liu, Yanfen ;

Lv, Zebin ;

Bai, Yu ;

Wang, Yu ;

Liu, Kun ;

Lin, Zhiye ;

Ou, Jianming .

CERAMICS INTERNATIONAL, 2023, 49 (23) :38000-38006

[33] Low thermal conductivity in high-entropy rare-earth pyrosilicate solid-solutions for thermal environmental barrier coatings [J].

Turcer, Laura R. ;

Sengupta, Arundhati ;

Padture, Nitin P. .

SCRIPTA MATERIALIA, 2021, 191 :40-45

[34] Synthesis, microstructure, and thermophysical properties of high-entropy rare earth cerium and zirconium cerates [J].

Wang, Weijun ;

Pei, Xihang ;

Li, Xintian ;

Wen, Wei .

CERAMICS INTERNATIONAL, 2025, 51 (14) :19343-19354

[35] Understanding of the composition-structure-properties relationships in high-entropy rare earth zirconates [J].

Luo, Lirong ;

Wang, Wei ;

Wang, Lu ;

Guo, Fangwei ;

Sun, Youbei ;

Wang, Panpan ;

Zhang, Han ;

Lu, Jie ;

Zhao, Xiaofeng .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2025, 45 (05)

[36] Effect of configuration entropy on magnetocaloric effect of rare earth high-entropy alloy [J].

Lu, S. F. ;

Ma, L. ;

Wang, J. ;

Du, Y. S. ;

Li, L. ;

Zhao, J. T. ;

Rao, G. H. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2021, 874

[37] Single-phase lightweight high-entropy alloys with enhanced mechanical properties [J].

Jeong, Il-Seok ;

Lee, Joo-Hyoung .

MATERIALS & DESIGN, 2023, 227

[38] Thermodynamic properties of rare-earth tantalates enhanced by high entropy design [J].

Liu, Wenqing ;

Peng, Fan ;

Huang, Yiling ;

Zheng, Wei ;

Song, Xuemei ;

Zeng, Yi .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2024, 107 (08) :5421-5435

[39] Significantly reduced thermal conductivity through dual-site high-entropy strategy in rare-earth hexaaluminates [J].

Zhou, Lin ;

Liu, Ji-Xuan ;

Peng, Pai ;

Zhang, Qinghong ;

Zhang, Guo-Jun .

CERAMICS INTERNATIONAL, 2025, 51 (13) :17473-17483

[40] Magnetic properties and magnetocaloric effects of rare-earth based high-entropy amorphous microwires [J].

Wei, Shijie ;

Shen, Hongxian ;

Zhang, Lunyong ;

Cao, Fuyang ;

Sun, Jianfei .

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, 2024, 33 :6216-6222

← 1 2 3 4 5 →