High-temperature applications, such as gas turbines, aircraft engines, and industrial furnaces, require materials that can withstand extreme heat and thermal cycling. Thermal Barrier Coatings (TBCs) are commonly used to protect components in these applications from high-temperature degradation. TBCs are typically applied to the surface of components to provide thermal insulation and reduce heat transfer, thereby extending the service life of the components. This paper comprehensively studies different TBC techniques used in high-temperature applications. The methodology of this study involved a comprehensive review of existing literature on TBC techniques used in high-temperature applications. This review included studies on different types of TBC materials, deposition methods, and performance evaluations. In addition, data from relevant studies were analyzed to assess the effectiveness of different TBC techniques in protecting components from high-temperature degradation. The study revealed that several TBC techniques are commonly used in high-temperature applications. These techniques include Electron Beam Physical Vapour Deposition (EB-PVD), Atmospheric Plasma Spraying (APS), and sol-gel coating. Each technique has advantages and limitations regarding thermal insulation, adhesion strength, and durability. EB-PVD is known for its high thermal insulation properties and excellent adhesion strength, making it suitable for high-temperature applications. APS, on the other hand, is a cost-effective technique that can be used for large-scale production of TBCs. The sol-gel coating offers good thermal insulation and corrosion resistance but may have lower adhesion strength than other techniques. The study's findings suggest that the TBC technique should be based on specific requirements of the applications, such as temperature range, thermal cycling conditions, and component geometry, to protect components from high-temperature degradation. Further research is needed to optimize TBC techniques for specific high-temperature applications and improve their performance in harsh environments.