Multicomponent high-entropy zirconates with comprehensive properties for advanced thermal barrier coating

被引：234

作者：

Ren, Ke ^{[1
,2
]}

Wang, Qiankun ^{[1
,2
]}

Shao, Gang ^{[3
]}

Zhao, Xiaofeng ^{[4
]}

Wang, Yiguang ^{[1
]}

机构：

[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

[2] Northwestern Polytech Univ, Sci & Technol Thermostruct Composite Mat Lab, Xian 710072, Shaanxi, Peoples R China

[3] Zhengzhou Univ, Henan Prov Ind Technol Res Inst Resources & Mat, Zhengzhou 450001, Peoples R China

[4] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China

来源：

SCRIPTA MATERIALIA | 2020年 / 178卷

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; High-entropy ceramics; Rare earth zirconates; Thermophysical properties; CONDUCTIVITY; STRATEGIES; DESIGN; OXIDE;

D O I：

10.1016/j.scriptamat.2019.12.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Thermal barrier coating materials, commonly ceramics, are deposited on superalloy surfaces to improve their service temperature. However, the intrinsic brittleness and low thermal expansion of ceramics pose a great challenge to developing new materials to replace yttria-stabilized zirconia. Herein, entropy engineering is employed to fabricate multicomponent rare earth zirconates with a large coefficient of thermal expansion, excellent mechanical properties and ultralow thermal conductivity, without sacrificing other properties. This work provides a new insight into developing novel ceramics with a combination of mechanical and thermophysical properties, which would be significant in material development for thermal barrier coatings, thermoelectric fields, etc. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：382 / 386

页数：5

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