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Exploration of the low thermal conductivities of gamma-Y2Si2O7, beta-Y2Si2O7, beta-Yb2Si2O7, and beta-Lu2Si2O7 as novel environmental barrier coating candidates
Tian, Zhilin; Zheng, Liya; Li, Zhaojin; Li, Jialin; Wang, Jingyang; Wang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Peoples R China.
2016-09-01
发表期刊JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN0955-2219
卷号36期号:11页码:2813-2823
摘要Thermal conductivities of gamma-Y2Si2O7, beta-Y2Si2O7 beta-Yb2Si2O7, and beta-Lu2Si2O7 were investigated by combined first-principles calculations and experimental evaluation. Theoretical calculation was used to predict the elastic properties, anisotropic minimum thermal conductivities, and temperature dependent lattice thermal conductivities. Experimentally, thermal conductivities of these disilicates were measured from room temperature to 1273 K. In addition, their experimental intrinsic lattice thermal conductivities were determined from the corrected thermal diffusivity data after removing the extrinsic contributions from phonon scattering by defects and thermal radiation. The experimental lattice thermal conductivities match well with the theoretical predictions. Furthermore, Raman spectra of the disilicates was measured and used to estimate the optical phonon relaxation time. The present results clearly disclose the specific material parameters that determine the low thermal conductivity of RE2Si2O7 and may provide guidelines for the optimal thermal conductivity of rare earth disilicates. (C) 2016 Elsevier Ltd. All rights reserved.
部门归属[tian, zhilin ; li, zhaojin ; li, jialin ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, high performance ceram div, shenyang 110016, peoples r china ; [tian, zhilin ; li, zhaojin] univ chinese acad sci, beijing 100049, peoples r china ; [zheng, liya] univ london imperial coll sci technol & med, dept chem engn, exhibit rd, london sw7 2az, england
关键词Rare-earth Silicates Environmental Barrier Coating Thermal Conductivity
学科领域Materials Science
资助者Natural Sciences Foundation of China [51372252, 51402313, 51402311]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75769
专题中国科学院金属研究所
通讯作者Wang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, High Performance Ceram Div, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Tian, Zhilin,Zheng, Liya,Li, Zhaojin,et al. Exploration of the low thermal conductivities of gamma-Y2Si2O7, beta-Y2Si2O7, beta-Yb2Si2O7, and beta-Lu2Si2O7 as novel environmental barrier coating candidates[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2016,36(11):2813-2823.
APA Tian, Zhilin,Zheng, Liya,Li, Zhaojin,Li, Jialin,Wang, Jingyang,&Wang, JY .(2016).Exploration of the low thermal conductivities of gamma-Y2Si2O7, beta-Y2Si2O7, beta-Yb2Si2O7, and beta-Lu2Si2O7 as novel environmental barrier coating candidates.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,36(11),2813-2823.
MLA Tian, Zhilin,et al."Exploration of the low thermal conductivities of gamma-Y2Si2O7, beta-Y2Si2O7, beta-Yb2Si2O7, and beta-Lu2Si2O7 as novel environmental barrier coating candidates".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 36.11(2016):2813-2823.
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