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Hierarchical thermal transport mechanisms in Yb2Si2O7 multifunctional thermal and environmental barrier coating (TEBC) material
Luo, Yixiu1; Yang, Xiaolong2; Wang, Jingyang1
Corresponding AuthorWang, Jingyang(jywang@imr.ac.cn)
2021-03-15
Source PublicationSCRIPTA MATERIALIA
ISSN1359-6462
Volume194Pages:5
AbstractUnderstanding 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.
KeywordCeramic Thermal conductivity Modeling Phonon engineering
Funding OrganizationNational Science and Technology Major Project ; Natural Science Foundation of China ; CAS International Cooperation Key Program ; Shenyang National Laboratory for Materials Science
DOI10.1016/j.scriptamat.2020.113704
Indexed BySCI
Languageen
Funding ProjectNational 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 Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000613278700016
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160511
Collection中国科学院金属研究所
Corresponding AuthorWang, Jingyang
Affiliation1.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
Recommended Citation
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.
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