CMAS corrosion behavior of laser-glazed LaYbZrCeO7/YSZ TBCs: Experimental and first-principles calculation

Pengsen Zhao; Haizhong Zheng; Guifa Li; Yongxiang Geng; Yixin Xiao; Hongbo Guo; Jian He; Ping Peng

doi:10.1016/j.ceramint.2025.04.192

CMAS corrosion behavior of laser-glazed LaYbZrCeO₇/YSZ TBCs: Experimental and first-principles calculation

Pengsen Zhao
, Haizhong Zheng^*
, Guifa Li
, Yongxiang Geng
, Yixin Xiao
, Hongbo Guo
, Jian He
, Ping Peng

^*Corresponding author for this work

School of Materials Science and Engineering

Nanchang Hangkong University
Beihang University
Hunan University

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

3 Scopus citations

Abstract

CaO-MgO-Al₂O₃-SiO₂ (CMAS) corrosion behavior of laser-glazed (LG) LaYbZrCeO₇/YSZ (LYZCO/YSZ) TBCs at 1300 °C was systematically studied utilizing experiment and first-principles calculation. Results indicate that LG-LYZCO coating's equiaxed or columnar grain gaps provide open channels for molten CMAS infiltration. These channels are closed via product Ca₂ ((La,Yb)_xCe_1-x)₈(SiO₄)₆O_6-4x apatite particles under CMAS attack. Compared with as-sprayed YSZ, LZO, and LYZCO coatings, LG-LYZCO coating owns exceptional CMAS resistance (30 min, the reaction layer thickness is just ∼6.4 μm) due to the rapid formation of Ca₂ ((La,Yb)_xCe_1-x)₈(SiO₄)₆O_6-4x. Formation enthalpy of Ca₂ ((La,Yb)_xCe_1-x)₈(SiO₄)₆O_6-4x is merely -(4.500–4.938) eV. Additionally, molten CMAS adheres poorly to the LYZCO surface. Diffusion of (Ca↔RE) and (Si↔RE) is also hard at the CMAS/LYZCO_reactant interface.

Original language	English
Pages (from-to)	30011-30023
Number of pages	13
Journal	Ceramics International
Volume	51
Issue number	20
DOIs	https://doi.org/10.1016/j.ceramint.2025.04.192
State	Published - Aug 2025

Keywords

(Ca↔RE) and (Si↔RE)
CMAS
Ca((La,Yb)Ce)(SiO)O
Grain gap
LG-LYZCO coating

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10.1016/j.ceramint.2025.04.192

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title = "CMAS corrosion behavior of laser-glazed LaYbZrCeO7/YSZ TBCs: Experimental and first-principles calculation",

abstract = "CaO-MgO-Al2O3-SiO2 (CMAS) corrosion behavior of laser-glazed (LG) LaYbZrCeO7/YSZ (LYZCO/YSZ) TBCs at 1300 °C was systematically studied utilizing experiment and first-principles calculation. Results indicate that LG-LYZCO coating's equiaxed or columnar grain gaps provide open channels for molten CMAS infiltration. These channels are closed via product Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x apatite particles under CMAS attack. Compared with as-sprayed YSZ, LZO, and LYZCO coatings, LG-LYZCO coating owns exceptional CMAS resistance (30 min, the reaction layer thickness is just ∼6.4 μm) due to the rapid formation of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x. Formation enthalpy of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x is merely -(4.500–4.938) eV. Additionally, molten CMAS adheres poorly to the LYZCO surface. Diffusion of (Ca↔RE) and (Si↔RE) is also hard at the CMAS/LYZCOreactant interface.",

keywords = "(Ca↔RE) and (Si↔RE), CMAS, Ca((La,Yb)Ce)(SiO)O, Grain gap, LG-LYZCO coating",

author = "Pengsen Zhao and Haizhong Zheng and Guifa Li and Yongxiang Geng and Yixin Xiao and Hongbo Guo and Jian He and Ping Peng",

note = "Publisher Copyright: {\textcopyright} 2025 Elsevier Ltd and Techna Group S.r.l.",

year = "2025",

month = aug,

doi = "10.1016/j.ceramint.2025.04.192",

language = "英语",

volume = "51",

pages = "30011--30023",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "20",

}

TY - JOUR

T1 - CMAS corrosion behavior of laser-glazed LaYbZrCeO7/YSZ TBCs

T2 - Experimental and first-principles calculation

AU - Zhao, Pengsen

AU - Zheng, Haizhong

AU - Li, Guifa

AU - Geng, Yongxiang

AU - Xiao, Yixin

AU - Guo, Hongbo

AU - He, Jian

AU - Peng, Ping

PY - 2025/8

Y1 - 2025/8

N2 - CaO-MgO-Al2O3-SiO2 (CMAS) corrosion behavior of laser-glazed (LG) LaYbZrCeO7/YSZ (LYZCO/YSZ) TBCs at 1300 °C was systematically studied utilizing experiment and first-principles calculation. Results indicate that LG-LYZCO coating's equiaxed or columnar grain gaps provide open channels for molten CMAS infiltration. These channels are closed via product Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x apatite particles under CMAS attack. Compared with as-sprayed YSZ, LZO, and LYZCO coatings, LG-LYZCO coating owns exceptional CMAS resistance (30 min, the reaction layer thickness is just ∼6.4 μm) due to the rapid formation of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x. Formation enthalpy of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x is merely -(4.500–4.938) eV. Additionally, molten CMAS adheres poorly to the LYZCO surface. Diffusion of (Ca↔RE) and (Si↔RE) is also hard at the CMAS/LYZCOreactant interface.

AB - CaO-MgO-Al2O3-SiO2 (CMAS) corrosion behavior of laser-glazed (LG) LaYbZrCeO7/YSZ (LYZCO/YSZ) TBCs at 1300 °C was systematically studied utilizing experiment and first-principles calculation. Results indicate that LG-LYZCO coating's equiaxed or columnar grain gaps provide open channels for molten CMAS infiltration. These channels are closed via product Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x apatite particles under CMAS attack. Compared with as-sprayed YSZ, LZO, and LYZCO coatings, LG-LYZCO coating owns exceptional CMAS resistance (30 min, the reaction layer thickness is just ∼6.4 μm) due to the rapid formation of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x. Formation enthalpy of Ca2 ((La,Yb)xCe1-x)8(SiO4)6O6-4x is merely -(4.500–4.938) eV. Additionally, molten CMAS adheres poorly to the LYZCO surface. Diffusion of (Ca↔RE) and (Si↔RE) is also hard at the CMAS/LYZCOreactant interface.

KW - (Ca↔RE) and (Si↔RE)

KW - CMAS

KW - Ca((La,Yb)Ce)(SiO)O

KW - Grain gap

KW - LG-LYZCO coating

UR - https://www.scopus.com/pages/publications/105003749094

U2 - 10.1016/j.ceramint.2025.04.192

DO - 10.1016/j.ceramint.2025.04.192

M3 - 文章

AN - SCOPUS:105003749094

SN - 0272-8842

VL - 51

SP - 30011

EP - 30023

JO - Ceramics International

JF - Ceramics International

IS - 20

ER -

CMAS corrosion behavior of laser-glazed LaYbZrCeO₇/YSZ TBCs: Experimental and first-principles calculation

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Keywords

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