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Theoretical Prediction and Experimental Investigation on the Thermal and Mechanical Properties of Bulk beta-Yb2Si2O7
Y. C. Zhou; C. Zhao; F. Wang; Y. J. Sun; L. Y. Zheng; X. H. Wang
2013
Source PublicationJournal of the American Ceramic Society
ISSN0002-7820
Volume96Issue:12Pages:3891-3900
AbstractThe thermal and mechanical properties of -Yb2Si2O7 were investigated using a combination of first-principles calculations and experimental investigations. Theoretically, anisotropic chemical bonding and elastic properties, weak interatomic (010) and (001) planes in the crystal structure, damage tolerance, and low thermal conductivity are predicted. Experimentally, preferred orientation, superior mechanical properties, and damage tolerant behavior for hot-pressed bulk -Yb2Si2O7 are approved. Slipping along the weakly bonded {010}, {001}, or {100} planes, grain delamination, buckling, and kinking of nanolaminated grains are identified as main mechanisms for damage tolerance. The anisotropic linear thermal expansion coefficients (CTEs) are: (a)=(3.57 +/- 0.18)x10(-6)K(-1), (b)=(2.49 +/- 0.14)x10(6)K(-1), and (c)=(1.48 +/- 0.22)x10(-6)K(-1) (673-1273K). A low thermal conductivity of similar to 2.1W (mK)(-1) at 1273K has been confirmed. The unique combination of these properties endow it a potential candidate for thermal barrier coating (TBC)/environmental barrier coating of silicon-based ceramics.
description.department[zhou, yan-chun ; zhao, cen ; sun, yin-jie] aerosp res inst mat & proc technol, sci & technol adv funct composite lab, beijing 100076, peoples r china. [zhao, cen ; wang, feng] beijing univ chem technol, state key lab chem resource engn, beijing key lab electrochem proc & technol mat, beijing 100029, peoples r china. [zhao, cen] cnooc energy technol & serv pipe engn co, tianjin 300452, peoples r china. [zheng, li-ya ; wang, xiao-hui] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; zhou, yc (reprint author), aerosp res inst mat & proc technol, sci & technol adv funct composite lab, beijing 100076, peoples r china. ; yczhou714@gmail.com ; wangf@mail.buct.edu.cn
KeywordEnvironmental Barrier Coatings Damage Tolerance Microstructural Evolution Crystal Morphology Ceramics Gamma-y2si2o7 Si3n4 Conductivity Temperature Yb2o3
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72430
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Y. C. Zhou,C. Zhao,F. Wang,et al. Theoretical Prediction and Experimental Investigation on the Thermal and Mechanical Properties of Bulk beta-Yb2Si2O7[J]. Journal of the American Ceramic Society,2013,96(12):3891-3900.
APA Y. C. Zhou,C. Zhao,F. Wang,Y. J. Sun,L. Y. Zheng,&X. H. Wang.(2013).Theoretical Prediction and Experimental Investigation on the Thermal and Mechanical Properties of Bulk beta-Yb2Si2O7.Journal of the American Ceramic Society,96(12),3891-3900.
MLA Y. C. Zhou,et al."Theoretical Prediction and Experimental Investigation on the Thermal and Mechanical Properties of Bulk beta-Yb2Si2O7".Journal of the American Ceramic Society 96.12(2013):3891-3900.
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