Comprehensive understanding of coupled stress characteristics in ytterbium disilicate environmental barrier coatings undergoing corrosion transformation and thermal cycling

Huang, Yan‐Hua; Wei, Zhi-Yuan; Zhang, Qiang; Cai, Hongneng; Han, Xu; Dong, Xiao-Xue

doi:10.1016/j.ceramint.2022.05.232

Cited by 6 publications

(2 citation statements)

References 41 publications

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“…14,15 Mismatching in CTE among EBCs and CMCs induces thermal stress and cracks, which provide invasion channels for corrosion gases and thus accelerate the failure of EBCs. 28 Unsuitable thermal conductivity will increase the temperature of the inside CMCs and worsen the already terrible conditions. 29,30 These basic non-environmental performances determine the first rationality of designed EBCs' material and structure, which are summarized and shown in Figure 1C.…”

Section: Introductionmentioning

confidence: 99%

“…Coating peeling is a catastrophic failure no matter what coating materials and preparation method are used, so it is important to test the adhesive strength of the coatings 14,15 . Mismatching in CTE among EBCs and CMCs induces thermal stress and cracks, which provide invasion channels for corrosion gases and thus accelerate the failure of EBCs 28 . Unsuitable thermal conductivity will increase the temperature of the inside CMCs and worsen the already terrible conditions 29,30 .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of environmental barrier coatings: A review

Xiao

Li²,

Huang

et al. 2023

Int J Applied Ceramic Tech

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Environmental barrier coatings (EBCs) greatly improve the service performance of SiC‐based ceramic matrix composites (CMCs) in high‐temperature combustion chambers. Working environments with physical ablation, high temperature, and chemical corrosion require the performance of designed EBC materials and/or structures to be properly evaluated before their real applications. In this paper, EBCs’ lifetime‐related phase stability, chemical compatibility, and microstructure retainability are discussed. And then, evaluation methods for basic and environmental properties of EBCs are thoroughly reviewed with newly proposed methods and improved techniques. Pros and cons of each method along with some potential strategies/techniques are also provided. We hope this article can give a timely and overall review for efficient and effective evaluation of EBCs and provide guidance not only for beginners but also for seasoned researchers when they design and develop high‐performance EBC systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of environmental barrier coatings: A review

Xiao

Li²,

Huang

et al. 2023

Int J Applied Ceramic Tech

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Thermal Shock Damage and Failure Mechanism of 2D Laminated SiC/SiC with Barium‐Strontium Aluminosilicate‐Based Environmental Barrier Coating

Cao,

Li,

Han

et al. 2024

Adv Eng Mater

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Thermal shock damage is a key issue for the stable service of SiC/SiC with environmental barrier coating (EBC) in aero‐engines. The thermal shock damage behavior of SiC/SiC with barium‐strontium aluminosilicate (BSAS)‐based EBC in an air atmosphere quenched by air and water media between RT and 1200 °C is systematically investigated. After 600 thermal shock cycles, cracks form in the EBC due to a sharp increase in the internal thermal stresses, and a SiO2 TGO layer is formed on the Si bonding coat. Based on the TGO thickness, damage within BSAS/mullite coatings is quantified by the oxygen permeability (2.541 × 10−11 mol·(atm cm s)−1), which is increased by 2.5 times compared to static oxidation. Despite cracking damage occurring in the SiC matrix of SiC/SiC substrates, the load‐bearing capability of SiC fibers is improved due to the modulus matching of the fiber/matrix. Oxidation damage is dominated the degradation of the performance of SiC/SiC substrates, whose flexural strength is decreased by 15% after 600 cycles. In the thermal shock test quenched by water media, the strength retention of SiC/SiC‐EBC is below 60%, and an increase in internal defects and even delamination of the SiC/SiC substrate are the main reasons for the thermal shock failure of SiC/SiC‐EBC.

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Assessment of stresses and strains accompanying the degradation of the surface layer composition of a coated cylindrical part under operating conditions

Knyazeva

Nazarenko

2023

J Eng Math

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Comprehensive understanding of coupled stress characteristics in ytterbium disilicate environmental barrier coatings undergoing corrosion transformation and thermal cycling

Cited by 6 publications

References 41 publications

Evaluation of environmental barrier coatings: A review

Evaluation of environmental barrier coatings: A review

Thermal Shock Damage and Failure Mechanism of 2D Laminated SiC/SiC with Barium‐Strontium Aluminosilicate‐Based Environmental Barrier Coating

Assessment of stresses and strains accompanying the degradation of the surface layer composition of a coated cylindrical part under operating conditions

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