Interface evolution of Si/Mullite/Yb2SiO5 PS-PVD environmental barrier coatings under high temperature

Xiaofeng Zhang; Jinbing Song; Ziqian Deng; Chao Wang; Shaopeng Niu; Guo Liu; Chunming Deng; Changguang Deng; Min Liu; Kesong Zhou; Jian Lu

doi:10.1016/j.jeurceramsoc.2019.10.062

Author(s)

Xiaofeng Zhang
Jinbing Song
Ziqian Deng
Chao Wang
Shaopeng Niu
Chunming Deng
Changguang Deng
Min Liu
Kesong Zhou

Related Research Unit(s)

Department of Mechanical Engineering

Detail(s)

Original language	English
Pages (from-to)	1478-1487
Journal / Publication	Journal of the European Ceramic Society
Volume	40
Issue number	4
Online published	4 Nov 2019
Publication status	Published - Apr 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.jeurceramsoc.2019.10.062 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85075459072&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(fa4acc20-b632-40c5-96a6-d235bad5fac6).html

Abstract

Plasma spray-physical vapor deposition (PS-PVD) was used to prepare tri-layer environmental barrier coatings (EBCs) Si/mullite/Yb₂SiO₅ on SiC_f/SiC substrate. Isothermal oxidation tests of EBCs were performed at 1300 ℃ for 1000 h. The thermochemical and thermomechanical interface interaction among EBCs were investigated. The results show that more dense EBCs can be obtained through PS-PVD process, which is attributed to the mixed deposition of liquid/gas states. After isothermal oxidation, many pores were observed in the Yb₂SiO₅ coating near the interface of Yb₂SiO₅/mullite coating, which results from the diffusion of Yb₂O₃ phase dissociated from Yb₂SiO₅ into mullite coating at high temperature. In the mullite coating, the Yb₂O₃ reacted with Al₂O₃ generating rod-like Yb₃Al₅O₁₂ phase. Additionally, due to the thermal expansion mismatch and high temperature oxidation, cracks were formed at the interfaces of mullite/Si coating. Those interface cracks resulted in buckling in the mullite coating.

Research Area(s)

EBCs, Interface reaction, Isothermal oxidation, PS-PVD

Citation Format(s)

[ RIS ] [ BibTeX ]

Interface evolution of Si/Mullite/Yb₂SiO₅ PS-PVD environmental barrier coatings under high temperature. / Zhang, Xiaofeng; Song, Jinbing; Deng, Ziqian et al.
In: Journal of the European Ceramic Society, Vol. 40, No. 4, 04.2020, p. 1478-1487.

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

Zhang, X, Song, J, Deng, Z, Wang, C, Niu, S, Liu, G, Deng, C, Deng, C, Liu, M, Zhou, K & Lu, J 2020, 'Interface evolution of Si/Mullite/Yb₂SiO₅ PS-PVD environmental barrier coatings under high temperature', Journal of the European Ceramic Society, vol. 40, no. 4, pp. 1478-1487. https://doi.org/10.1016/j.jeurceramsoc.2019.10.062

Zhang, X., Song, J., Deng, Z., Wang, C., Niu, S., Liu, G., Deng, C., Deng, C., Liu, M., Zhou, K., & Lu, J. (2020). Interface evolution of Si/Mullite/Yb₂SiO₅ PS-PVD environmental barrier coatings under high temperature. Journal of the European Ceramic Society, 40(4), 1478-1487. https://doi.org/10.1016/j.jeurceramsoc.2019.10.062

Zhang X, Song J, Deng Z, Wang C, Niu S, Liu G et al. Interface evolution of Si/Mullite/Yb₂SiO₅ PS-PVD environmental barrier coatings under high temperature. Journal of the European Ceramic Society. 2020 Apr;40(4):1478-1487. Epub 2019 Nov 4. doi: 10.1016/j.jeurceramsoc.2019.10.062

Zhang, Xiaofeng ; Song, Jinbing ; Deng, Ziqian et al. / Interface evolution of Si/Mullite/Yb₂SiO₅ PS-PVD environmental barrier coatings under high temperature. In: Journal of the European Ceramic Society. 2020 ; Vol. 40, No. 4. pp. 1478-1487.