Pronounced enhancement of thermal expansion coefficients of rare-earth zirconate by cerium doping

Yang, Jun1; Zhao, Meng2; Zhang, Lei3; Wang, Ziyuan1; Pan, Wei1

2018-08

10.1016/j.scriptamat.2018.04.031

SCRIPTA MATERIALIA   影响因子和分区

1359-6462

Rare-earth zirconates (RE2Zr2O7, RE = rare earth elements) are considered as promising thermal barrier coating (TBCs) materials. However, their thermal expansion coefficient (TEC) is relatively low comparing with that of either the state-of-the-art TBCs material Yttria-stabilized Zirconia (YSZ), or the metallic bond-coat. In present research, Cerium was introduced as the substitution of Zirconium to improve the TEC of rare-earth zirconates. A series of Yb-2(Zr1-xCex)(2)O-7 solid solutions were synthesized and investigated. Experimental results revealed that their TEC is remarkably increased with the Cerium substitution content. Meanwhile, their thermal conductivity shows no obvious increase compared with that of Yb(2)Zr(2)O(7)due to the phonon scattering effect. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Thermal expansion coefficient Thermal conductivity Phonon scattering Thermal barrier coating

SCI ; EI

英语

其他

National Natural Science Foundation of China[51590893] ; National Natural Science Foundation of China[51472135] ; National Natural Science Foundation of China[51272120]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000437815600001

PERGAMON-ELSEVIER SCIENCE LTD

20181805131420

Cerium ; Expansion ; Phonon scattering ; Phonons ; Rare earths ; Thermal barrier coatings ; Thermal conductivity ; Yttria stabilized zirconia ; Yttrium oxide ; Zirconia

Rare Earth Metals:547.2 ; Thermodynamics:641.1 ; Inorganic Compounds:804.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
2.Delft Univ Technol, Dept Mat Sci & Engn, Delft, Netherlands
3.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China

Yang, Jun,Zhao, Meng,Zhang, Lei,et al. Pronounced enhancement of thermal expansion coefficients of rare-earth zirconate by cerium doping[J]. SCRIPTA MATERIALIA,2018,153:1-5.

Yang, Jun,Zhao, Meng,Zhang, Lei,Wang, Ziyuan,&Pan, Wei.(2018).Pronounced enhancement of thermal expansion coefficients of rare-earth zirconate by cerium doping.SCRIPTA MATERIALIA,153,1-5.

Yang, Jun,et al."Pronounced enhancement of thermal expansion coefficients of rare-earth zirconate by cerium doping".SCRIPTA MATERIALIA 153(2018):1-5.