ABSTRACT
The thermal barrier coating (TBCs) processes have been employed on the substrate material for improving the thermal stability and corrosion resistance properties of the coated structure. Some crucial parameters play a significant role in the coating microstructure formation, like the selection of coating powders, material deposition rate and techniques used for material deposition. Over the past three decades, numerous new surface coating powders have been found to improve the coating structure and its thermal, chemical and mechanical properties. Some researchers are doing impressive work for the advancements in coating microstructure formation, making the powder-based material more suitable for operating at high-temperatures and corrosive environmental conditions without rupturing the coating surface. This chapter briefly analyses the deterioration of the coating structure that can be reduced by applying various methods of TBCs. It is discovered that some properties still need to be have significant improvement for achieving an optimum quality of the surface coating. This study helps to examine the techniques used to protect the substrate metal using different coating techniques. The microstructural behaviour at the time of the working environment’s conditions such as hot corrosion, calcium – magnesium – alumina – silicate (CMAS) attack, oxidation, deterioration, damage to foreign objects and sintering and phase transformations: all these parameters determine the quality of the coating surface. Approaches to mitigate the various effects on the failure system's processes and recent advances to reduce the thermal conductivity of TBCs are also discussed. The importance of this investigation is that it fully understands the relationship between the TBC methods that affect some properties of the coated structure. Some significant points that have been considered for TBCs, like the characteristics, parameters and microstructure, made it very helpful to support improved and innovative TBC inventions for surface-development industrial applications.
