Reduced thermal conductivity of solid solution of 20% CeO2 + ZrO2 and 8% Y2O3 + ZrO2 prepared by atmospheric plasma spray technique

doi:10.1016/j.ceramint.2018.09.252

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 Publication	CERAMICS INTERNATIONAL
ISSN	0272-8842
Volume	45 Issue:1 Pages:839
Subtype	Article
Abstract	To 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.
Keyword	Solid solution Thermal barrier coating 8YSZ Thermal conductivity
DOI	10.1016/j.ceramint.2018.09.252
WOS Keyword	BARRIER COATINGS ; STORAGE CAPACITY ; TEMPERATURE ; BEHAVIOR ; MICROSTRUCTURES ; PURITY ; OXYGEN ; PHASE ; OXIDE
Language	英语
WOS Research Area	Materials Science
Publisher	ELSEVIER SCI LTD
Citation statistics	Cited Times:7[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://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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