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Enhanced insulation temperature and the reduced thermal conductivity of nanostructured ceramic coating systems
L. H. Liang; H. Wei; X. C. Chang; W. Xu; X. N. Li; Y. G. Wei
2013
Source PublicationInternational Journal of Heat and Mass Transfer
ISSN0017-9310
Volume65Pages:219-224
AbstractThe theoretical model on the size-dependent thermal conductivity of the nanograins and the composites, based on the phonon confinement and the boundary scattering effects, was developed to predict the 68% reduced thermal conductivity of the nanostructured ceramic coatings made of grains of 40-100 nm compared with the conventional ceramic coatings with micron-scale grains. In order to validate the model, the nanostructured zirconia layers and the corresponding conventional layers were sprayed on the same alloy matrixes, and the insulation temperatures were measured at different temperatures up to 1273 K. It was found that insulation temperature of the nanostructured ceramic systems enhanced about 200 K at most compared with that of the conventional ones. And the average enhancement of the insulation effect is in agreement with the theoretical prediction. The nanostructured ceramic coated systems provide the extending application in thermal barrier engineering, thermoelectric devices and other related applications. (C) 2013 Elsevier Ltd. All rights reserved.
description.department[liang, l. h. ; xu, w. ; li, x. n. ; wei, y. g.] chinese acad sci, inst mech, lnm, beijing 100190, peoples r china. [wei, h. ; chang, x. c.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; liang, lh (reprint author), chinese acad sci, inst mech, lnm, beijing 100190, peoples r china. ; lianglh@lnm.imech.ac.cn
KeywordNanoparticles Thermal Conductivity Size Effect Insulation Temperature Barrier Coatings Silicon Nanowires Zirconia Coatings
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71345
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
L. H. Liang,H. Wei,X. C. Chang,et al. Enhanced insulation temperature and the reduced thermal conductivity of nanostructured ceramic coating systems[J]. International Journal of Heat and Mass Transfer,2013,65:219-224.
APA L. H. Liang,H. Wei,X. C. Chang,W. Xu,X. N. Li,&Y. G. Wei.(2013).Enhanced insulation temperature and the reduced thermal conductivity of nanostructured ceramic coating systems.International Journal of Heat and Mass Transfer,65,219-224.
MLA L. H. Liang,et al."Enhanced insulation temperature and the reduced thermal conductivity of nanostructured ceramic coating systems".International Journal of Heat and Mass Transfer 65(2013):219-224.
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