Microstructures, thermophysical properties and corrosion behaviours of equiatomic five-component rare-earth monosilicates

被引:14
作者
Tan, Yongqiang [1 ]
Liao, Wei [1 ]
Zeng, Song [1 ]
Jia, Peng [1 ]
Teng, Zhen [1 ]
Zhou, Xiaosong [1 ]
Zhang, Haibin [1 ]
机构
[1] China Acad Engn Phys, Inst Nucl Phys & Chem, Innovat Res Team Adv Ceram, Mianyang 621900, Peoples R China
关键词
High-entropy ceramics; Monosilicates; Thermal conductivity; Corrosion resistance; Water vapor; ENVIRONMENTAL BARRIER COATINGS; THERMAL-EXPANSION COEFFICIENT; HIGH-ENTROPY CERAMICS; WATER-VAPOR; RE2SIO5; RE; SILICATE; CONDUCTIVITY; EVOLUTION; OXIDATION; DESIGN;
D O I
10.1016/j.jallcom.2022.164334
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Four equiatomic five-component rare earth monosilicates solid solutions were prepared by spark plasma sintering. Two compositions with larger deviation of ionic radii, (Dy0.2Ho0.2Er0.2Tm0.2Yb0.2)2SiO5 and (Dy0.2Ho0.2Er0.2Y0.2Lu0.2)2SiO5, exhibit single-phase structures and homogenous elemental distributions. Extremely low high-temperature thermal conductivities below 1 Wm-1 K-1 and similar coefficients of thermal expansion with SiC were achieved for both compositions. Further, they both displayed good hightemperature stability and high corrosion resistance in water vapor. When exposed to 1400 degrees C, 90%RH water vapor, only slight weight losses were observed for both compositions during the initial half hours, after which almost no further weight losses were observed.
引用
收藏
页数:7
相关论文
共 33 条
[1]   High entropy (Y0.2Yb0.2Lu0.2Eu0.2Er0.2)3Al5O12: A novel high temperature stable thermal barrier material [J].
Chen, Heng ;
Zhao, Zifan ;
Xiang, Huimin ;
Dai, Fu-Zhi ;
Xu, Wei ;
Sun, Kuang ;
Liu, Jiachen ;
Zhou, Yanchun .
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2020, 48 (48) :57-62
[2]   High entropy (Yb0.25Y0.25Lu0.25Er0.25)2SiO5 with strong anisotropy in thermal expansion [J].
Chen, Heng ;
Xiang, Huimin ;
Dai, Fu-Zhi ;
Liu, Jiachen ;
Zhou, Yanchun .
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, 2020, 36 :134-139
[3]   High-entropy environmental barrier coating for the ceramic matrix composites [J].
Dong, Yu ;
Ren, Ka ;
Lu, Yonghong ;
Wang, Qiankun ;
Liu, Jia ;
Wang, Yiguang .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2019, 39 (07) :2574-2579
[4]   Accelerated oxidation of SiCCMC's by water vapor and protection via environmental barrier coating approach [J].
Eaton, HE ;
Linsey, GD .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (14-15) :2741-2747
[5]   Thermochemical stability of Y2Si2O7 in high-temperature water vapor [J].
Golden, Robert A. ;
Mueller, Kendall ;
Opila, Elizabeth J. .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2020, 103 (08) :4517-4535
[6]   Study on water vapor corrosion resistance of rare earth monosilicates RE2SiO5 (RE = Lu, Yb, Tm, Er, Ho, Dy, Y, and Sc) from first-principles calculations [J].
Han, Jing ;
Wang, Yanfei ;
Liu, Rongjun ;
Jiang, Di .
HELIYON, 2018, 4 (10)
[7]   Rare earth silicate environmental barrier coatings for SiC/SiC composites and Si3N4 ceramics [J].
Lee, KN ;
Fox, DS ;
Bansal, NP .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2005, 25 (10) :1705-1715
[8]   Theoretical investigation of phonon contributions to thermal expansion coefficients for rare earth monosilicates RE2SiO5 (RE = Dy, Ho, Er, Tm, Yb and Lu) [J].
Li, Yiran ;
Wang, Jiemin ;
Wang, Jingyang .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2020, 40 (07) :2658-2666
[9]   High temperature water vapour corrosion of rare earth disilicates (Y,Yb,Lu)2Si2O7 in the presence of Al(OH)3 impurities [J].
Maier, N. ;
Nickel, K. G. ;
Rixecker, G. .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (07) :2705-2713
[10]   Young's modulus, thermal expansion coefficient and fracture behavior of selected Si-B-C based carbides in the 20-1200 °C temperature range as derived from the behavior of carbon fiber reinforced microcomposites [J].
Michaux, A. ;
Sauder, C. ;
Camus, G. ;
Pailler, R. .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2007, 27 (12) :3551-3560