Recent developments in the designing of deposition of thermal barrier coatings – A review

Mehta, Amrinder; Vasudev, Hitesh; Singh, Sharanjit

doi:10.1016/j.matpr.2020.02.271

Cited by 72 publications

(12 citation statements)

References 69 publications

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“…Thermal barrier coatings (TBCs) are common porous materials coating the surface of devices operating under high temperatures and are essentially designed for heat insulation purposes. There are a number of recent reviews summarizing the design aspects of TBCs [ 130,131 ] but not much has been reported about their EM wave propagation characteristics. Though some studies present a comprehensive investigation on the microstructural effect on the radiative scattering coefficient and asymmetry factor of anisotropic TBCs, [ 35,132,133 ] TBCs usually consist of bond coat (metal alloys) and topcoat (ceramics) containing 6–8 wt% yttrium‐stabilized zirconia (or YSZ), and APS and electron beam physical vapor deposition (EB‐PVD) are the two main approaches to fabricate TBCs.…”

Section: Electromagnetic Wave Propagation Characteristics Of Thermal ...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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This review aims to consolidate scattered literature on thermally sprayed coatings with nonionizing electromagnetic (EM) wave absorption and shielding over specific wavelengths potentially useful in diverse applications (e.g., microwave to millimeter wave, solar selective, photocatalytic, interference shielding, thermal barrier‐heat/emissivity). Materials EM properties such as electric permittivity, magnetic permeability, electrical conductivity, and dielectric loss are critical due to which a material can respond to absorbed, reflected, transmitted, or may excite surface electromagnetic waves at frequencies typical of electromagnetic radiations. Thermal spraying is a standard industrial practice used for depositing coatings where the sprayed layer is formed by successive impact of fully or partially molten droplets/particles of a material exposed to high or moderate temperatures and velocities. However, as an emerging novel application of an existing thermal spray techniques, some special considerations are warranted for targeted development involving relevant characterization. Key potential research areas of development relating to material selection and coating fabrication strategies and their impact on existing practices in the field are identified. The study shows a research gap in the feedstock materials design and doping, and their complex selection covered by thermally sprayed coatings that can be critical to advancing applications exploiting their electromagnetic properties.

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Section: Electromagnetic Wave Propagation Characteristics Of Thermal ...mentioning

confidence: 99%

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

et al. 2022

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“…The materials and different processes can be used to process the surface properties [65,66]. Surface qualities may be modified via the use of various materials and techniques [67][68][69][70][71][72].…”

Section: Voltage Vmentioning

confidence: 99%

Machinability behavior of human implant materials

Singh

Gul

2022

J. Electrochem. Sci. Eng.

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In the present day and age, engineered materials are making significant strides in their application in the biomedical sector. Human implants have piqued the interest of material and metallurgy researchers due to their unique properties. Machining the materials into implants customized for individual patients has been the standard practice nowadays. To contribute further to the same area, the current research work aims to investigate the machinability of T-L107.12 (a titanium-based human implant) using a non-traditional method called wire electrical discharge machining (WEDM). The machinability of the machining process has been evaluated based on the material removal rate using a roughness meter and the atomic force microscope. The further impact of the machining parameters on the output responses was analyzed based on the statistical analysis.

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“…Deposition techniques have also been attributed to the performance and behaviors of the TBC. There are a number of TBC deposition techniques such as electron-beam physical vapor deposition (EB-PVD), atmospheric plasma spraying, (APS), suspension plasma spraying (SPS), and solution precursor plasma spraying (SPPS) [35,36].…”

Section: Tbc In Advanced Gas Turbinesmentioning

confidence: 99%

Test-Rig Simulation on Hybrid Thermal Barrier Coating Assisted with Cooling Air System for Advanced Gas Turbine under Prolonged Exposures—A Review

et al. 2021

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Thermal barrier coating (TBC) and cooling air systems are among the technologies that have been introduced and applied in pursuing the extensive development of advanced gas turbine. TBC is used to protect the gas turbine components from the higher operating temperature of advanced gas turbine, whereas cooling air systems are applied to assist TBC in lowering the temperature exposure of protected surfaces. Generally, a gas turbine operates in three main operational modes, which are base load, peak load, and part peak load. TBC performance under these three operational modes has become essential to be studied, as it will provide the gas turbine owners not only with the behaviors and damage mechanism of TBC but also a TBC life prediction in a particular operating condition. For TBC under base load or so called steady-state condition, a number of studies have been reviewed and discussed. However, it has been found that most of the studies have been conducted without the assistance of a cooling air system, which does not simulate the TBC in advanced gas turbine completely. From this review, the studies on TBC-assisted cooling air system to simulate the advanced gas turbine operating conditions have also been summarized, which are limited to test rig simulations under thermal cyclic mode where thermal cyclic represents peak and part peak load conditions. The equipment used to simulate the gas turbine operating condition, test temperatures, and durations are parameters that have been taken into consideration under this review. Finally, a test rig that is capable of simulating both TBC and cooling air effects at a high operating temperature of advanced gas turbines for prolonged exposure under steady-state condition has been proposed to be developed.

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Recent developments in the designing of deposition of thermal barrier coatings – A review

Cited by 72 publications

References 69 publications

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Thermal Spray Coatings for Electromagnetic Wave Absorption and Interference Shielding: A Review and Future Challenges

Machinability behavior of human implant materials

Test-Rig Simulation on Hybrid Thermal Barrier Coating Assisted with Cooling Air System for Advanced Gas Turbine under Prolonged Exposures—A Review

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