Effect of Thermal Barrier Coating in Sustainable Power production of Gas Turbines

Ghosh, Sandip; Saha, Mrinmoy; Bakshi, Supriya; Mondal, S

doi:10.1088/1757-899x/1187/1/012034

Cited by 3 publications

(1 citation statement)

References 15 publications

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“…Employing TBC alongside cooling mechanisms not only lowers temperatures and extends the lifespan of turbines but also enables higher combustion temperatures for increased efficiency output. By applying a coating with low thermal conductivity, the surface temperature can be reduced by up to 300 • C [24].…”

Section: Aerospace Applicationsmentioning

confidence: 99%

A Comprehensive Understanding of Thermal Barrier Coatings (TBCs): Applications, Materials, Coating Design and Failure Mechanisms

Bogdan,

Peter

2024

Metals

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This review offers a comprehensive analysis of thermal barrier coatings (TBCs) applied to metallic materials. By reviewing the recent literature, this paper reports on a collection of technical information, involving the structure and role of TBCs, various materials and coating processes, as well as the mechanisms involved in the durability and failure of TBCs. Although TBCs have been successfully utilized in advanced applications for nearly five decades, they continue to be a subject of keen interest and ongoing study in the world of materials science, with overviews of the field’s evolution remaining ever relevant. Thus, this paper outlines the current requirements of the main application areas of TBCs (aerospace, power generation and the automotive and naval industries) and the properties and resistance to thermal, mechanical and chemical stress of the different types of materials used, such as zirconates, niobates, tantalates or mullite. Additionally, recent approaches in the literature, such as high-entropy coatings and multilayer coatings, are presented and discussed. By analyzing the failure processes of TBCs, issues related to delamination, spallation, erosion and oxidation are revealed. Integrating TBCs with the latest generations of superalloys, as well as examining heat transfer mechanisms, could represent key areas for in-depth study.

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Section: Aerospace Applicationsmentioning

confidence: 99%

A Comprehensive Understanding of Thermal Barrier Coatings (TBCs): Applications, Materials, Coating Design and Failure Mechanisms

Bogdan,

Peter

2024

Metals

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Influence of High-Temperature Aggressive Environments on the Durability of Composites Reinforced with Refractory Particles

Rusinov,

Kurapov,

Rusinova

et al. 2024

Metals

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The problem of increasing heat resistance and corrosion and erosion resistance of gas turbine units in compressor stations was solved through the development of new layered materials containing nanostructured grains. The authors carried out a destruction analysis of gas turbine units in compressor stations. It was shown that after 10–30,000 h of operation, the greatest damage occurred when the gas turbine operated in dusty environments at high temperatures (or in air environments with a high salt content). The developed layered composites include the thermal barrier and functional reinforced nanostructured layers consisting of refractory carbides and oxides. This paper describes the destruction mechanism of gas turbine units under the influence of high-temperature aggressive environments. As a result, a new formation technology for reinforced nanostructured layered composites has been developed. The developed composition makes it possible to increase the heat resistance of materials by approximately 10 times. This significantly increases the reliability and durability of gas turbine units in compressor stations. The structural and mechanical parameters of the layered nanostructured heat-resistant composites have been studied.

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Diffusional Interactions and their Applications in Reducing Interdiffusion in Bond Coat Systems Used in Turbine Blades

Samantaray¹,

Kulkarni²

2023

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">Interdiffusion analysis in multicomponent alloy systems plays a pivotal role in controlling various processes and in designing materials. Interdiffusion of elements also leads to changes in microstructure and properties during service, especially for the materials operating at elevated temperatures. The urge of increasing efficiency of gas turbine engines has led to the demand of higher service temperatures and longer life, which is achieved by the application of thermal barrier coatings (TBC) on Ni based superalloys. To prevent oxidation damage to the superalloy substrate, bond coats are used in which diffusion acts as a key factor influencing the stability and durability of the engine components. Over the last few decades, β-(Ni,Pt)Al coatings have been widely employed as bond coat materials because the presence of Pt enhances oxidation resistance by accelerating diffusion of Al to generate a continuously growing TGO (Thermally grown oxide) layer. However, this also encourages the interdiffusion of Ni and Al between the bond coat and the substrate, which weakens the TBC system. Therefore, a thorough understanding of diffusion behaviour is required in the bond coat materials. In the present study, ternary interdiffusion coefficients are determined in β-(Ni,Pt)Al at 1100 °C. Knowledge of such diffusional interactions would further open new avenues to design bond compositions and process sequences in order to minimize the microstructural changes caused by interdiffusion processes in service.</div></div>

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Effect of Thermal Barrier Coating in Sustainable Power production of Gas Turbines

Cited by 3 publications

References 15 publications

A Comprehensive Understanding of Thermal Barrier Coatings (TBCs): Applications, Materials, Coating Design and Failure Mechanisms

A Comprehensive Understanding of Thermal Barrier Coatings (TBCs): Applications, Materials, Coating Design and Failure Mechanisms

Influence of High-Temperature Aggressive Environments on the Durability of Composites Reinforced with Refractory Particles

Diffusional Interactions and their Applications in Reducing Interdiffusion in Bond Coat Systems Used in Turbine Blades

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