Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material

doi:10.1016/j.scriptamat.2020.113704

CORC > 金属研究所 > 中国科学院金属研究所

	Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material
	Luo, Yixiu 1; Yang, Xiaolong 2; Wang, Jingyang 1
刊名	SCRIPTA MATERIALIA
	2021-03-15
卷号	194 页码:5
关键词	Ceramic Thermal conductivity Modeling Phonon engineering
ISSN号	1359-6462
DOI	10.1016/j.scriptamat.2020.113704
通讯作者	Wang, Jingyang(jywang@imr.ac.cn)
英文摘要	Understanding the mechanism of thermal conduction and its modulation strategy is a threshold task in the search of advanced multifunctional thermal and environmental barrier coating materials (TEBCs). We herein disclose the hierarchical features in the thermal transport of a typical TEBC material, Yb2Si2O7, using the state-of-the-art dual-phonon theory. Large amounts of vibrational modes transport heat in a diffusive feature, different from the propagative feature for normal phonons, and make significant contribution to the lattice thermal conductivity (kappa(L)) at high temperatures (T). This mechanism drives a weak kappa(L)similar to T dependence at high temperatures, deviating from the kappa(L)similar to T-1 trend predicted by the phonon Boltzmann transport equation (BTE) theory. The present study indicates that modulating the kappa L-L of complex-structure low-kappa(L) TEBC materials requires wisdoms beyond the BTE theory and considering the joint effects from different thermal transport channels. (c) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
资助项目	National Science and Technology Major Project[2017-VI-0020-0093] ; Natural Science Foundation of China[51772302] ; CAS International Cooperation Key Program[174321KYSB20180008] ; Shenyang National Laboratory for Materials Science[L2019F22]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000613278700016
资助机构	National Science and Technology Major Project ; Natural Science Foundation of China ; CAS International Cooperation Key Program ; Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160510]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Jingyang
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yixiu,Yang, Xiaolong,Wang, Jingyang. Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material[J]. SCRIPTA MATERIALIA,2021,194:5.
APA	Luo, Yixiu,Yang, Xiaolong,&Wang, Jingyang.(2021).Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material.SCRIPTA MATERIALIA,194,5.
MLA	Luo, Yixiu,et al."Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material".SCRIPTA MATERIALIA 194(2021):5.