Anti-CMAS corrosion mechanism of Al2O3 pore sealing and laser remelting on thermal barrier coatings

Zehao Chen; Peng Hu; Yanling Pei; Junpeng Teng; Tao Dong; Jinlong Wang; Minghui Chen; Shusuo Li; Fuhui Wang

doi:10.1016/j.jeurceramsoc.2022.11.031

Anti-CMAS corrosion mechanism of Al₂O₃ pore sealing and laser remelting on thermal barrier coatings

Zehao Chen^*
, Peng Hu
, Yanling Pei
, Junpeng Teng
, Tao Dong
, Jinlong Wang
, Minghui Chen
, Shusuo Li
, Fuhui Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The sol-dip-coating method and surface laser remelting technology are applied to form an Al₂O₃ layer on a YSZ coating surface to effectively block the environmental sediment CMAS. The behaviour and mechanism for CMAS corrosion of the coating are investigated, and the interfacial reliability of the coating and matrix is calculated by using the Monte Carlo method. The bonding force between the Al₂O₃ sol and YSZ coating can be effectively improved by laser surface treatment. Samples subjected to a laser pretreatment and posttreatment (YL-AL) of the YSZ coating are found to show the best interfacial bonding strength between Al₂O₃ and YSZ. Furthermore, the YL-AL sample shows a higher CMAS resistance than the laser posttreatment (Y-AL) samples, which effectively combines the chemical resistance of Al₂O₃ to CMAS and the physical resistance of the laser re-melted densification layer against CMAS penetration.

Original language	English
Pages (from-to)	1567-1578
Number of pages	12
Journal	Journal of the European Ceramic Society
Volume	43
Issue number	4
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2022.11.031
State	Published - Apr 2023

Keywords

CMAS
Failure process
Interface reliability calculation
Surface protection
Yttria oxide stabilized zirconia (YSZ)

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10.1016/j.jeurceramsoc.2022.11.031

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title = "Anti-CMAS corrosion mechanism of Al2O3 pore sealing and laser remelting on thermal barrier coatings",

abstract = "The sol-dip-coating method and surface laser remelting technology are applied to form an Al2O3 layer on a YSZ coating surface to effectively block the environmental sediment CMAS. The behaviour and mechanism for CMAS corrosion of the coating are investigated, and the interfacial reliability of the coating and matrix is calculated by using the Monte Carlo method. The bonding force between the Al2O3 sol and YSZ coating can be effectively improved by laser surface treatment. Samples subjected to a laser pretreatment and posttreatment (YL-AL) of the YSZ coating are found to show the best interfacial bonding strength between Al2O3 and YSZ. Furthermore, the YL-AL sample shows a higher CMAS resistance than the laser posttreatment (Y-AL) samples, which effectively combines the chemical resistance of Al2O3 to CMAS and the physical resistance of the laser re-melted densification layer against CMAS penetration.",

keywords = "CMAS, Failure process, Interface reliability calculation, Surface protection, Yttria oxide stabilized zirconia (YSZ)",

author = "Zehao Chen and Peng Hu and Yanling Pei and Junpeng Teng and Tao Dong and Jinlong Wang and Minghui Chen and Shusuo Li and Fuhui Wang",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2023",

month = apr,

doi = "10.1016/j.jeurceramsoc.2022.11.031",

language = "英语",

volume = "43",

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journal = "Journal of the European Ceramic Society",

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TY - JOUR

T1 - Anti-CMAS corrosion mechanism of Al2O3 pore sealing and laser remelting on thermal barrier coatings

AU - Chen, Zehao

AU - Hu, Peng

AU - Pei, Yanling

AU - Teng, Junpeng

AU - Dong, Tao

AU - Wang, Jinlong

AU - Chen, Minghui

AU - Li, Shusuo

AU - Wang, Fuhui

PY - 2023/4

Y1 - 2023/4

N2 - The sol-dip-coating method and surface laser remelting technology are applied to form an Al2O3 layer on a YSZ coating surface to effectively block the environmental sediment CMAS. The behaviour and mechanism for CMAS corrosion of the coating are investigated, and the interfacial reliability of the coating and matrix is calculated by using the Monte Carlo method. The bonding force between the Al2O3 sol and YSZ coating can be effectively improved by laser surface treatment. Samples subjected to a laser pretreatment and posttreatment (YL-AL) of the YSZ coating are found to show the best interfacial bonding strength between Al2O3 and YSZ. Furthermore, the YL-AL sample shows a higher CMAS resistance than the laser posttreatment (Y-AL) samples, which effectively combines the chemical resistance of Al2O3 to CMAS and the physical resistance of the laser re-melted densification layer against CMAS penetration.

AB - The sol-dip-coating method and surface laser remelting technology are applied to form an Al2O3 layer on a YSZ coating surface to effectively block the environmental sediment CMAS. The behaviour and mechanism for CMAS corrosion of the coating are investigated, and the interfacial reliability of the coating and matrix is calculated by using the Monte Carlo method. The bonding force between the Al2O3 sol and YSZ coating can be effectively improved by laser surface treatment. Samples subjected to a laser pretreatment and posttreatment (YL-AL) of the YSZ coating are found to show the best interfacial bonding strength between Al2O3 and YSZ. Furthermore, the YL-AL sample shows a higher CMAS resistance than the laser posttreatment (Y-AL) samples, which effectively combines the chemical resistance of Al2O3 to CMAS and the physical resistance of the laser re-melted densification layer against CMAS penetration.

KW - CMAS

KW - Failure process

KW - Interface reliability calculation

KW - Surface protection

KW - Yttria oxide stabilized zirconia (YSZ)

UR - https://www.scopus.com/pages/publications/85142163511

U2 - 10.1016/j.jeurceramsoc.2022.11.031

DO - 10.1016/j.jeurceramsoc.2022.11.031

M3 - 文章

AN - SCOPUS:85142163511

SN - 0955-2219

VL - 43

SP - 1567

EP - 1578

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 4

ER -

Anti-CMAS corrosion mechanism of Al₂O₃ pore sealing and laser remelting on thermal barrier coatings

Abstract

Keywords

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