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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

1 Scopus Citations
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Author(s)

  • Xiaofeng Zhang
  • Chao Wang
  • Ruijun Ye
  • Chunming Deng
  • Xinghua Liang
  • Ziqian Deng
  • Shaopeng Niu
  • Jinbing Song
  • Min Liu
  • Kesong Zhou
  • Junli Feng

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)102-108
Journal / PublicationJournal of Materiomics
Volume6
Issue number1
Online published16 Jan 2020
Publication statusPublished - Mar 2020

Link(s)

Abstract

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.

Research Area(s)

  • Environmental barrier coatings, PS-PVD, Vertical crack, Yb2SiO5 coating

Citation Format(s)

Mechanism of vertical crack formation in Yb2SiO5 coatings deposited via plasma spray-physical vapor deposition. / Zhang, Xiaofeng; Wang, Chao; Ye, Ruijun; Deng, Chunming; Liang, Xinghua; Deng, Ziqian; Niu, Shaopeng; Song, Jinbing; Liu, Guo; Liu, Min; Zhou, Kesong; Lu, Jian; Feng, Junli.

In: Journal of Materiomics, Vol. 6, No. 1, 03.2020, p. 102-108.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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