Dominant effects of 2D pores on mechanical behaviors of plasma sprayed ceramic coatings during thermal exposure

Wang, Li-Shuang; Tang, Chunhua; Dong, Hui; Li, Chang-Jiu; Yang, Guan–Jun

doi:10.1016/j.ceramint.2019.11.168

Cited by 6 publications

(6 citation statements)

References 63 publications

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“…As a result, the initial dwell time finishes most of the changing degrees. For example [161], the changing degrees of porosity, 2D pore density, and hardness were 83%, 66%, and 83%, respectively. These results suggested that the total sintering process is obviously nonlinear.…”

Section: Sintering Stressmentioning

confidence: 99%

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Progress in ceramic materials and structure design toward advanced thermal barrier coatings

et al. 2022

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Thermal barrier coatings (TBCs) can effectively protect the alloy substrate of hot components in aeroengines or land-based gas turbines by the thermal insulation and corrosion/erosion resistance of the ceramic top coat. However, the continuous pursuit of a higher operating temperature leads to degradation, delamination, and premature failure of the top coat. Both new ceramic materials and new coating structures must be developed to meet the demand for future advanced TBC systems. In this paper, the latest progress of some new ceramic materials is first reviewed. Then, a comprehensive spalling mechanism of the ceramic top coat is summarized to understand the dependence of lifetime on various factors such as oxidation scale growth, ceramic sintering, erosion, and calcium-magnesium-aluminium-silicate (CMAS) molten salt corrosion. Finally, new structural design methods for high-performance TBCs are discussed from the perspectives of lamellar, columnar, and nanostructure inclusions. The latest developments of ceramic top coat will be presented in terms of material selection, structural design, and failure mechanism, and the comprehensive guidance will be provided for the development of next-generation advanced TBCs with higher temperature resistance, better thermal insulation, and longer lifetime.

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Section: Sintering Stressmentioning

confidence: 99%

“…This suggests that the change in 2D pores is consistent with the property changes. The relationships between 1011 www.springer.com/journal/40145 hardness and microstructure that are characterized by 2D pores and porosity were reported [161]. If the porosity and 2D pore density change to 0, the normalized hardness should be 1.…”

Section: Sintering Stressmentioning

confidence: 99%

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

et al. 2022

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“…A previous study [61] reported the dynamic evolution of a coating sintered at high temperatures and the healing mechanism of 2D pores. Figure 17 shows the structural proximately 40% after thermal exposure (Figure 15), but the self-standing thermal diffusivity first increased, then decreased, and then stabilized because of the generation of many cracks during cooling.…”

Section: Degradation Mechanism Of Thermal Insulationmentioning

confidence: 99%

“…A previous study [61] reported the dynamic evolution of a coating sintered at high temperatures and the healing mechanism of 2D pores. Figure 17 shows the structural Sintering leads to an approximate 80% increase in thermal conductivity [77,98,100,101].…”

Section: Degradation Mechanism Of Thermal Insulationmentioning

confidence: 99%

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Multi-Scale Structural Design and Advanced Materials for Thermal Barrier Coatings with High Thermal Insulation: A Review

et al. 2023

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Thermal barrier coatings (TBCs) are a fundamental technology used in high-temperature applications to protect superalloy substrate components. However, extreme high-temperature environments present many challenges for TBCs, such as the degradation of their thermal and mechanical properties. Hence, highly insulating, long-life TBCs must be developed to meet higher industrial efficiency. This paper reviews the main factors influencing the thermal insulation performance of TBCs, such as material, coating thickness, and structure. The heat transfer mechanism of the coating is summarized, and the degradation mechanism of the thermal insulation is analyzed from the perspective of the coating structure. Finally, the recent advances in improving the thermal insulation and lifetime of coatings are reviewed in terms of advanced materials and structural design, which will benefit advanced TBCs in future engineering applications and provide guidance for the next generation of high thermal insulating TBCs.

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Study on Microstructure Characterisation of Three Different Surface Coating Techniques on 6082-T6 Aluminum Alloy

2020

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Dominant effects of 2D pores on mechanical behaviors of plasma sprayed ceramic coatings during thermal exposure

Cited by 6 publications

References 63 publications

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Progress in ceramic materials and structure design toward advanced thermal barrier coatings

Multi-Scale Structural Design and Advanced Materials for Thermal Barrier Coatings with High Thermal Insulation: A Review

Study on Microstructure Characterisation of Three Different Surface Coating Techniques on 6082-T6 Aluminum Alloy

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