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

	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
刊名	CERAMICS INTERNATIONAL
	2019-01-30
卷号	45 期号:1 页码:839
关键词	Solid solution Thermal barrier coating 8YSZ Thermal conductivity
ISSN号	0272-8842
DOI	10.1016/j.ceramint.2018.09.252
文献子类	Article
英文摘要	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.
WOS关键词	BARRIER COATINGS ; STORAGE CAPACITY ; TEMPERATURE ; BEHAVIOR ; MICROSTRUCTURES ; PURITY ; OXYGEN ; PHASE ; OXIDE
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27569]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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.