SIC OpenIR
Reduced thermal conductivity of solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 prepared by atmospheric plasma spray technique
Khan, Matiullah; Zeng, Yi; Lan, Zhenghua; Wang, Yongzhe
2019-01-30
Source PublicationCERAMICS INTERNATIONAL
ISSN0272-8842
Volume45Issue:1Pages:839
SubtypeArticle
AbstractTo reduce the thermal conductivity and improve the durability of ZrO2 based materials, coatings from different contents of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 are deposited by atmospheric plasma spray technique. The obtained coatings are characterized by X-ray diffraction, scanning electron microscopy and the thermal diffusivity/conductivity is calculated. Substitutional point defects are created in the coating which improves the phonon scattering thereby influencing the thermal conductivity. Pores and cracks are identified in the microstructure and quantitatively analyzed. Samples with higher concentration of defects provided minimum thermal conductivity which might be due to the enhanced phonon scattering. Among the prepared coatings, samples with 25% of 20% CeO2 + ZrO2 and 75% of 8% Y2O3 + ZrO2 provided minimum thermal conductivity in the temperature range 25-1200 degrees C. The prepared coatings are compared with the pure 8% Y2O3 + ZrO2 coatings. The solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 demonstrated lower thermal conductivity than the 8YSZ. The reduced thermal conductivity is attributed to the higher concentration of defects which improve the phonons scattering.
KeywordSolid solution Thermal barrier coating 8YSZ Thermal conductivity
DOI10.1016/j.ceramint.2018.09.252
WOS KeywordBARRIER COATINGS ; STORAGE CAPACITY ; TEMPERATURE ; BEHAVIOR ; MICROSTRUCTURES ; PURITY ; OXYGEN ; PHASE ; OXIDE
Language英语
WOS Research AreaMaterials Science
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27569
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Khan, Matiullah,Zeng, Yi,Lan, Zhenghua,et al. Reduced thermal conductivity of solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 prepared by atmospheric plasma spray technique[J]. CERAMICS INTERNATIONAL,2019,45(1):839.
APA Khan, Matiullah,Zeng, Yi,Lan, Zhenghua,&Wang, Yongzhe.(2019).Reduced thermal conductivity of solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 prepared by atmospheric plasma spray technique.CERAMICS INTERNATIONAL,45(1),839.
MLA Khan, Matiullah,et al."Reduced thermal conductivity of solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 prepared by atmospheric plasma spray technique".CERAMICS INTERNATIONAL 45.1(2019):839.
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