Improved thermal properties and CMAS corrosion resistance of high-entropy RE zirconates by tuning fluorite-pyrochlore structure

doi:10.1016/j.ceramint.2024.03.018

	Improved thermal properties and CMAS corrosion resistance of high-entropy RE zirconates by tuning fluorite-pyrochlore structure
	Tian, Yue 1; Zhao, Xiuyi 1; Sun, Zhipei 1; Liang, Yongqi 1; Xiao, Guozheng 1; Wang, Chao 1; Liu, Shiying 1; Liu, Feng 1; Lu, Xuefeng2 ; Wu, Yusheng 1
	2024
发表期刊	Ceramics International
ISSN	0272-8842
摘要	The order-disorder transition (ODT) of RE zirconate (RE2Zr2O7) has received much attention due to its potential applications in the design of thermal barrier coatings (TBCs). A series of high entropy RE zirconates (RE = La, Sm, Gd, Er and Lu) were designed and synthesized in order to regulate the fluorite-pyrochlore phases, and to investigate the effect of phase composition on the microstructures and performances. The results showed that the sintering temperature, as well as equivalent ion radius, played an important role in regulating the phase transformation of fluorite-pyrochlore. The coexistence of pyrochlore-fluorite phases not only can result in the decrease in grain size but also increased the lattice strain of each phase, thereby enhancing the phonon scattering and contributing to the reduction in the thermal conductivity. The CMAS corrosion resistance was mainly related to phase compositions, and the thicknesses of reaction layer decreased gradually with the increasing fluorite phase content. The results will provide theoretical guidance for the microstructural design of high entropy RE zirconates as next generation TBC materials in future. © 2024 Elsevier Ltd and Techna Group S.r.l.
关键词	Corrosion resistance Entropy Order disorder transitions Phase composition Phase structure Sintering Thermal barrier coatings Thermal conductivity Zirconium compounds CMAS corrosion resistance Dual phase structures Fluorite phase High-entropy RE zirconate Order-disorder transition Pyrochlore phasis Pyrochlore structures Pyrochlores Synthesised Zirconates
DOI	10.1016/j.ceramint.2024.03.018
收录类别	EI
语种	英语
出版者	Elsevier Ltd
EI入藏号	20241115723315
EI主题词	Fluorspar
EI分类号	482.2 Minerals ; 539.1 Metals Corrosion ; 641.1 Thermodynamics ; 931.2 Physical Properties of Gases, Liquids and Solids ; 933 Solid State Physics ; 951 Materials Science
原始文献类型	Article in Press
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/170258
专题	材料科学与工程学院
通讯作者	Wang, Chao; Wu, Yusheng
作者单位	1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang; 110870, China; 2.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	材料科学与工程学院
通讯作者单位	材料科学与工程学院
第一作者的第一单位	材料科学与工程学院
推荐引用方式 GB/T 7714	Tian, Yue,Zhao, Xiuyi,Sun, Zhipei,et al. Improved thermal properties and CMAS corrosion resistance of high-entropy RE zirconates by tuning fluorite-pyrochlore structure[J]. Ceramics International,2024.
APA	Tian, Yue.,Zhao, Xiuyi.,Sun, Zhipei.,Liang, Yongqi.,Xiao, Guozheng.,...&Wang, Zhanjie.(2024).Improved thermal properties and CMAS corrosion resistance of high-entropy RE zirconates by tuning fluorite-pyrochlore structure.Ceramics International.
MLA	Tian, Yue,et al."Improved thermal properties and CMAS corrosion resistance of high-entropy RE zirconates by tuning fluorite-pyrochlore structure".Ceramics International (2024).