Abstract
Kinetic Metallization (KM), which is one of the spraying systems for particle deposition, has been studied as a new system of bond coatings of Thermal Barrier Coatings (TBCs) for components used in hot section of advanced gas turbine systems. In this paper, mechanical and oxidation properties including residual stress of Atmospheric Plasma Sprayed (APS) YSZ top coating with two different bond coating spraying systems, Low Pressure Plasma Spraying (LPPS) and KM, were evaluated and compared in thermal cycle tests. From the results, in case of the CoNiCrAlY bond coating sprayed by KM, the porosity is less than 4.2%. The relatively less oxidation layer is observed due to its higher density and more stable oxide growth. And, the variation range of residual stress of TBC with KM bond coat is narrower than that of LPPS relatively. This effect is assumed that bond coating by KM behaved elastically due to dense coatings.
