Thermal shock resistance of tri-layer Yb2SiO5/Yb2Si2O7/Si coating for SiC and SiC-matrix composites

doi:10.1111/jace.15713

	Thermal shock resistance of tri-layer Yb2SiO5/Yb2Si2O7/Si coating for SiC and SiC-matrix composites
	Zhong, Xin 1; Niu, Yaran ; Li, Hong 1; Zhou, Haijun 2; Dong, Shaoming 2; Zheng, Xuebin ; Ding, Chuanxian ; Sun, Jinliang 1
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2018
卷号	101 期号:10 页码:4743
关键词	environmental barrier coating microstructure rare earth silicates thermal shock resistance Yb2Si2O7
ISSN号	0002-7820
DOI	10.1111/jace.15713
英文摘要	A new tri-layer Yb2SiO5/Yb2Si2O7/Si coating was fabricated on SiC, C/SiC, and SiC/SiC substrates, respectively, using atmospheric plasma spray (APS) technique. All coated samples were subjected to thermal shock test at 1350 degrees C. The evolution of phase composition and microstructure and thermo-mechanical properties of those samples before and after thermal shock test were characterized. Results showed that adhesion between all the 3 layers and substrates appeared good. After thermal shock tests, through microcracks which penetrated the Yb2SiO5 top layer were mostly halted at the Yb2SiO5-Yb2Si2O7 interface and no thermal growth oxide (TGO) was formed after 40-50 quenching cycles, implying the excellent crack propagation resistance of the environmental barrier coating (EBC) system. Transmission electron microscopy analysis confirmed that twinnings and dislocations were the main mechanisms of plastic deformation of the Yb2Si2O7 coating, which might have positive effects on crack propagation resistance. The thermal shock behaviors were clarified based on thermal stresses combined with thermal expansion behaviors and elastic modulus analysis. This study provides a strategy for designing EBC systems with excellent crack propagation resistance.
学科主题	Materials Science, Ceramics
出版者	WILEY
WOS记录号	WOS:000440554000040
资助机构	Youth Innovation Promotion Association CAS, Grant/Award Number: 2014223 ; Engineering case study in extreme conditions using system mechanics approach, Grant/Award Number: XDB22010202 ; Youth Innovation Promotion Association CAS, Grant/Award Number: 2014223 ; Engineering case study in extreme conditions using system mechanics approach, Grant/Award Number: XDB22010202
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/24659]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Coating Mat CAS, Shanghai, Peoples R China 2.Shanghai Univ, Res Ctr Composite Mat, Shanghai, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Ceram, Struct Ceram & Composites Engn Res Ctr, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Zhong, Xin,Niu, Yaran,Li, Hong,et al. Thermal shock resistance of tri-layer Yb2SiO5/Yb2Si2O7/Si coating for SiC and SiC-matrix composites[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2018,101(10):4743, 4752.
APA	Zhong, Xin.,Niu, Yaran.,Li, Hong.,Zhou, Haijun.,Dong, Shaoming.,...&Sun, Jinliang.(2018).Thermal shock resistance of tri-layer Yb2SiO5/Yb2Si2O7/Si coating for SiC and SiC-matrix composites.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,101(10),4743.
MLA	Zhong, Xin,et al."Thermal shock resistance of tri-layer Yb2SiO5/Yb2Si2O7/Si coating for SiC and SiC-matrix composites".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 101.10(2018):4743.