A Review on FG -TBC Fabrication Methods

Functionally Graded Materials (FGMs) are good choices to provide a more efficient thermal barrier coating (TBC), to be utilized in engineering areas such as electricity generation as well as in aerospace engines. Energy scarcity, and also ever-increasing demands for higher electricity generation in gas turbines, result in advances in TBC structure and fabrication methods to improve mechanical and thermomechanical properties of the coating in harsh working condition, which results in diminishing detrimental effects of elevated temperature and also enhance power efficiency. Using metal-ceramic materials of Nano dimension particles in coating structures, besides electron beams and thermal plasmas as primitive and most reliable sources of energy, in electron beam physical vapor deposition (EB-PVD) and atmospheric plasma spray (APS) respectively, as two contemporary fabrication process, lead to a more productive coating in TBCs. This paper presents a review of the existing literature for TBCs made of FGM (FG-TBCs), and focus on EB-PVD and APS as the most commonly used fabrication techniques for thin FGM coating.

Keywords:

Functionally Graded Material , Thermal Barrier Coating , EB-PVD , APS , FG-TBC.