Thermal barrier coatings with improved oxidation resistance

Glass–ceramics as oxidation resistant bond coat in thermal barrier coating system

“…Pint et al found out that the lifetime of TBC can be improved by employing a more oxidation resistant bond coat [8]. The TBC life was significantly enhanced by the use of an intermediate Al 2 O 3 diffusion barrier between the bond coat and the yttria stabilized zirconia top coat [9]. Functionally graded Al 2 O 3 -ZrO 2 thermal barrier coating was also found to decrease the oxidation rate of the TBC system [10].…”

Microstructure and Mechanical Properties of a Glass-ceramic Bond Coated TBC System

“…It can be noted that the nanohardness and Young's modulus of the substrate, bond coat and top coat measured on the plan-section of the TBC system were always higher than those measured on its cross-section at 100 mN applied load and thereby, indicating that anisotropy was present in the nanohardness and Young's modulus values of the TBC system. This was attributed to the high density of planar defects that were nearly parallel to the substrate (Schmitt- Thomas and Dietl (1994), Schmitt-Thomas et al (1996)). (Prescott et al (1992)), as can be seen from Fig.…”

Thermal and Structural Analysis of Functionally Graded NiCrAlY/YSZ/Al2O3 Coated Piston

“…However, the coatings are permeable to the atmospheric gases and liquids resulting in oxidation of the bond coat and spalling of the coating [13,14,15].…”