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Defect-mediated multiple-enhancement of phonon scattering and decrement of thermal conductivity in (YxYb1-x)(2)SiO5 solid solution
Tian, ZL; Lin, CF; Zheng, LY; Sun, LC; Li, JL; Wang, JY; Wang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
2018-02-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume144Pages:292-304
AbstractRare earth (RE) silicates are promising candidates for environmental and thermal barrier coating (ETBC) materials. Low thermal conductivity is one of the main concerned thermal properties in ETBC design. We herein adopted multiple phonon scattering mechanisms to lower thermal conductivity of (YxYb1-x)(2)SiO5 solid solutions. Bulk samples were prepared by hot pressing method and RE atomic occupations, Raman spectra, thermal conductivities were measured as well as Debye temperature was obtained from temperature dependent Young's modulus. It is interesting to note that huge mass and size misfits between Yb and Y ions dominate the decrement of thermal conductivity. Furthermore, Yb2+ increases the concentration of oxygen vacancy, and it further decreases heat conduction. This work highlights the possible defect engineering in RE silicates for their advances in ETBC applications. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Rare earth (RE) silicates are promising candidates for environmental and thermal barrier coating (ETBC) materials. Low thermal conductivity is one of the main concerned thermal properties in ETBC design. We herein adopted multiple phonon scattering mechanisms to lower thermal conductivity of (YxYb1-x)(2)SiO5 solid solutions. Bulk samples were prepared by hot pressing method and RE atomic occupations, Raman spectra, thermal conductivities were measured as well as Debye temperature was obtained from temperature dependent Young's modulus. It is interesting to note that huge mass and size misfits between Yb and Y ions dominate the decrement of thermal conductivity. Furthermore, Yb2+ increases the concentration of oxygen vacancy, and it further decreases heat conduction. This work highlights the possible defect engineering in RE silicates for their advances in ETBC applications. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[tian, zhilin ; zheng, liya ; sun, luchao ; li, jialin ; wang, jingyang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [lin, chunfu] hainan univ, coll mat & chem engn, state key lab marine resource utilizat south chin, haikou 570228, hainan, peoples r china
KeywordYttria-stabilized Zirconia Barrier-coating Applications High Temperatures Nitride Ceramics Single-crystal Youngs Modulus Yb Luminescence Composites Resistance
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Key R&D Program of China [2017YFB0703201]; Natural Science Foundation of China [5137225, 51772302]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79548
Collection中国科学院金属研究所
Corresponding AuthorWang, JY (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Tian, ZL,Lin, CF,Zheng, LY,et al. Defect-mediated multiple-enhancement of phonon scattering and decrement of thermal conductivity in (YxYb1-x)(2)SiO5 solid solution[J]. ACTA MATERIALIA,2018,144:292-304.
APA Tian, ZL.,Lin, CF.,Zheng, LY.,Sun, LC.,Li, JL.,...&Wang, JY .(2018).Defect-mediated multiple-enhancement of phonon scattering and decrement of thermal conductivity in (YxYb1-x)(2)SiO5 solid solution.ACTA MATERIALIA,144,292-304.
MLA Tian, ZL,et al."Defect-mediated multiple-enhancement of phonon scattering and decrement of thermal conductivity in (YxYb1-x)(2)SiO5 solid solution".ACTA MATERIALIA 144(2018):292-304.
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