Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition

Plasma spray-physical vapor deposition (i.e., PS-PVD) is a promising method for obtaining advanced environmental barrier coatings (EBCs). The EBCs must meet some requirements in the application, in which the thermal cycle performance affects the service lifetime. The preparation of artificial vertic...

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Main Authors:	Xiaofeng Zhang, Chao Wang, Ruijun Ye, Chunming Deng, Xinghua Liang, Ziqian Deng, Shaopeng Niu, Jinbing Song, Guo Liu, Min Liu, Kesong Zhou, Jian Lu, Junli Feng
Format:	Article
Language:	English
Published:	Elsevier 2020-03-01
Series:	Journal of Materiomics
Online Access:	http://www.sciencedirect.com/science/article/pii/S2352847819301972

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spelling	doaj-13982f402d3c49fcb19c04d0be4d46ea2020-11-25T03:00:18ZengElsevierJournal of Materiomics2352-84782020-03-0161102108Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor depositionXiaofeng Zhang0Chao Wang1Ruijun Ye2Chunming Deng3Xinghua Liang4Ziqian Deng5Shaopeng Niu6Jinbing Song7Guo Liu8Min Liu9Kesong Zhou10Jian Lu11Junli Feng12National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, China; Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China; Corresponding author. National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, China.National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaShenzhen Customs Industrial Products Inspection Technology Center, Shenzhen, 518067, ChinaNational Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaGuangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou, 545000, China; Corresponding author.National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaNational Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaNational Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaDepartment of Mechanical Engineering, City University of Hong Kong, Hong Kong, ChinaNational Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaNational Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou, 510650, ChinaDepartment of Mechanical Engineering, City University of Hong Kong, Hong Kong, ChinaShenzhen Customs Industrial Products Inspection Technology Center, Shenzhen, 518067, ChinaPlasma spray-physical vapor deposition (i.e., PS-PVD) is a promising method for obtaining advanced environmental barrier coatings (EBCs). The EBCs must meet some requirements in the application, in which the thermal cycle performance affects the service lifetime. The preparation of artificial vertical cracks in Yb2SiO5 coatings is an effective approach for meeting the requirements above because vertical cracks provide a strain tolerance. To clarify the formation mechanism of vertical cracks during the PS-PVD, the effects of coating thickness and substrate temperature on the formation of vertical cracks were investigated. In addition, the interactions of spray powder and plasma flame during coating deposition were also characterized by optical spectroscopy. It is indicated that vertical cracks are formed due to a thermal expansion mismatch between Yb2SiO5 and mullite coating, transient cooling after deposition and the nucleation of evaporated Yb2SiO5 as well. Keywords: Environmental barrier coatings, Yb2SiO5 coating, Vertical crack, PS-PVDhttp://www.sciencedirect.com/science/article/pii/S2352847819301972
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Xiaofeng Zhang Chao Wang Ruijun Ye Chunming Deng Xinghua Liang Ziqian Deng Shaopeng Niu Jinbing Song Guo Liu Min Liu Kesong Zhou Jian Lu Junli Feng
spellingShingle	Xiaofeng Zhang Chao Wang Ruijun Ye Chunming Deng Xinghua Liang Ziqian Deng Shaopeng Niu Jinbing Song Guo Liu Min Liu Kesong Zhou Jian Lu Junli Feng Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition Journal of Materiomics
author_facet	Xiaofeng Zhang Chao Wang Ruijun Ye Chunming Deng Xinghua Liang Ziqian Deng Shaopeng Niu Jinbing Song Guo Liu Min Liu Kesong Zhou Jian Lu Junli Feng
author_sort	Xiaofeng Zhang
title	Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition
title_short	Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition
title_full	Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition
title_fullStr	Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition
title_full_unstemmed	Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition
title_sort	mechanism of vertical crack formation in yb2sio5 coatings deposited via plasma spray-physical vapor deposition
publisher	Elsevier
series	Journal of Materiomics
issn	2352-8478
publishDate	2020-03-01
description	Plasma spray-physical vapor deposition (i.e., PS-PVD) is a promising method for obtaining advanced environmental barrier coatings (EBCs). The EBCs must meet some requirements in the application, in which the thermal cycle performance affects the service lifetime. The preparation of artificial vertical cracks in Yb2SiO5 coatings is an effective approach for meeting the requirements above because vertical cracks provide a strain tolerance. To clarify the formation mechanism of vertical cracks during the PS-PVD, the effects of coating thickness and substrate temperature on the formation of vertical cracks were investigated. In addition, the interactions of spray powder and plasma flame during coating deposition were also characterized by optical spectroscopy. It is indicated that vertical cracks are formed due to a thermal expansion mismatch between Yb2SiO5 and mullite coating, transient cooling after deposition and the nucleation of evaporated Yb2SiO5 as well. Keywords: Environmental barrier coatings, Yb2SiO5 coating, Vertical crack, PS-PVD
url	http://www.sciencedirect.com/science/article/pii/S2352847819301972
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Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition

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