Phase field model for diffusion-reaction stress field in the thermal barrier coatings corroded by the molten CMAS

Zhu, Wang; Chen, H.Y.; Yang, Li; Zhou, Yue; Xu, Guangnan

doi:10.1016/j.engfailanal.2020.104486

Cited by 14 publications

(3 citation statements)

References 40 publications

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“…For larger stresses, micro-cracks were formed, which eventually disrupted the YSZ structure and deteriorated the integrity of the TBCs. Zhu et al [115] developed phase field modelling that incorporates solute diffusion, chemical reactions, and elastic swelling to predict stress-fields in CMAS infiltrated TBCs that were consistent with the findings of Mercer et al [110] and Peng et al [114].…”

Section: Spallation Mechanicsmentioning

confidence: 59%

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Nieto

Agrawal

Bravo

et al. 2020

International Materials Reviews

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This review critically examines the current understanding of calcia-magnesia-aluminasilicate (CMAS) degradation mechanisms and mitigation approaches in thermal and environmental barrier coatings. First, the review introduces case studies of field returned engine components exposed to CMAS attack, followed by fundamental aspects of CMASinduced degradation. Understanding CMAS adhesion, infiltration, spallation mechanics, and thermochemical attack mechanisms is crucial to designing materials approaches to mitigate CMAS attack. CMAS mitigation strategies have focused on reactive approaches aimed at crystallising molten CMAS at the earliest stage possible to inhibit infiltration. Promising approaches are presented, starting with fundamental reaction kinetics studies, followed by the effects of microstructure in actual coatings systems. Salient results on coating systems tested in various burner rigs and a full engine test are presented to benchmark the success of various mitigation strategies. Lastly, several key future research areas are presented in order to provide a roadmap towards 'sandphobic' thermal and environmental barrier systems.

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Section: Spallation Mechanicsmentioning

confidence: 59%

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Nieto

Agrawal

Bravo

et al. 2020

International Materials Reviews

View full text Add to dashboard Cite

show abstract

“…6 Additionally, the phase transformation of YSZ induced by CMAS corrosion and thermal expansion mismatch between CMAS and TBC can also generate compressive stress in the coating. [15][16][17] To investigate the distribution and evolution of stress in TBCs under CMAS corrosion, Xu et al developed a constitutive theory to describe the CMAS corrosion process and determine the stress field for TBCs using the finite element method. 16 Furthermore, Li et al established a numerical simulation model based on experimental results obtained for CMAS corrosion and determined the evolution of the stress field as a function of CMAS corrosion time.…”

Section: Introductionmentioning

confidence: 99%

“…The expansion will introduce compressive stress in the TC layer due to the constraint of the substrate 6 . Additionally, the phase transformation of YSZ induced by CMAS corrosion and thermal expansion mismatch between CMAS and TBC can also generate compressive stress in the coating 15–17 . To investigate the distribution and evolution of stress in TBCs under CMAS corrosion, Xu et al.…”

Section: Introductionmentioning

confidence: 99%

Characterization of stress in a thermal barrier coating during CMAS corrosion using Ce³⁺ photoluminescence spectroscopy

et al. 2023

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The stress caused by calcium–magnesium–alumino–silicate (CMAS) corrosion is a critical factor in thermal barrier failure of thermal barrier coatings (TBCs). For the service safety of TBCs, it is important to characterize the stress inside TBCs during CMAS corrosion using a nondestructive and accurate method. In this study, photoluminescence spectroscopy technology was applied to characterize the stress in TBCs during CMAS corrosion. First, TBC specimens containing yttrium–aluminum–garnet doped with trace Ce3+ ions (YAG:Ce3+)/yttrium oxide partially stabilized zirconia double‐ceramic‐layer were prepared by atmospheric plasma spraying. Then, CMAS corrosion experiments were performed using the TBC specimens, and a mechanical model was derived based on Ce3+ photoluminescence spectroscopy to investigate the stress in the TBCs. Finally, the microstructure, extent of CMAS corrosion and stress field in TBC specimens, was characterized. The results reveal that the penetration of CMAS leads to local stress concentration and a nonlinear stress distribution from the outside surface to the inside of the YAG:Ce3+ layer. In addition, an increase in corrosion time, temperature, and CMAS concentration can significantly influence the evolution of the stress field in TBCs.

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Blocking effect in Nb-engineered high-entropy oxides with strengthened grain boundary corrosion resistance

Xue

Zhao

et al. 2023

Chemical Engineering Journal

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Phase field model for diffusion-reaction stress field in the thermal barrier coatings corroded by the molten CMAS

Cited by 14 publications

References 40 publications

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Characterization of stress in a thermal barrier coating during CMAS corrosion using Ce³⁺ photoluminescence spectroscopy

Blocking effect in Nb-engineered high-entropy oxides with strengthened grain boundary corrosion resistance

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Phase field model for diffusion-reaction stress field in the thermal barrier coatings corroded by the molten CMAS

Cited by 14 publications

References 40 publications

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Calcia–magnesia–alumina–silicate (CMAS) attack mechanisms and roadmap towards Sandphobic thermal and environmental barrier coatings

Characterization of stress in a thermal barrier coating during CMAS corrosion using Ce3+ photoluminescence spectroscopy

Blocking effect in Nb-engineered high-entropy oxides with strengthened grain boundary corrosion resistance

Contact Info

Product

Resources

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Characterization of stress in a thermal barrier coating during CMAS corrosion using Ce³⁺ photoluminescence spectroscopy