For over four decades, thermal barrier coatings, or simply TBC, have been decisive for the performance of gas turbines in aviation and aerospace, and more recently also in the performance of power generation turbines and diesel engines. Its importance overlaps the developments achieved in the area of materials with the advent of directional solidification and obtaining single crystals. Throughout this period, several studies around the world seek to better understand the processes occurring in the interaction of metal-ceramic system components themselves, both in their processing, as well as during operation of the components in service, subject to different mechanical and thermal stresses during cycles of heating and cooling of the coated components. Moreover, research constantly seek improvements in the performance of the coatings that allow meeting the growing demands of increased operating temperature and resistance to the aggression of external agents own the operating environment of such equipment. This article shows the importance of TBC coatings, recent developments, its main features, the different subjects and objects of research and the many challenges that are still present, requiring more research and opening options of utmost importance to scientific and technological research.
Thermal barrier coating; TBC; Thermal Spray; Metal-ceramic
