Study on the Thermal Properties According to Deposition Method of Thermal Barrier Coating

Thermal barrier coatings(TBCs) are increasingly applied to turbine components to enhance performance. These coatings not only shield materials from high-temperature environments but also mitigate oxidation and corrosion. TBCs consist of a top coating and a bond coating. This study presents measurement methods and results for each TBC layer , analyzing the thermophysical properties through literature comparisons. The thickness of specimen coating layers was measured using digital calipers and scanning electron microscopy (SEM), while thermal diffusivity was measured using a laser flash apparatus(LFA). For the top coating deposited via electron-beam physical vapor deposition(EB-PVD), thermal diffusivity was approximately 50% higher compared to the coatings produced by atmospheric plasma spray(APS). Furthermore, the bond coating applied via APS exhibited approximately 10% lower thermal diffusivity compared to coatings deposited using vacuum plasma spray(VPS).