Abstract
The industrial gas turbines components running at very high speeds under higher temperatures require to be coated with thermal barrier ceramic (TBC) coating materials for modifying their surfaces. Combined ceramic oxides and alloys (YSZ/Cr
2
O
3
)-coated TBCs posed a challenge for researchers to achieve more than required mechanical, tribological and thermal properties (MTTP). In this article, the impact of coating type (based on %yttria), temperature, and thicknesses and the bond coat thickness during atmospheric plasma coating process of TBC onto Inconel 718 Alloy were studied by the method of response surface (RSM). It figures out the most leading factors and their effect on different responses of MTTP that are significant when studied combinedly. The empirical models are established by ANOVA for MTTP with input factors and optimization carried out by Box–Behnken scheme of RSM. ANOVA showed the coating side temperature as the most significant factor. The desirability function approach was employed for minimizing the stress to 78.9 MPa and surface finish to10.05 μm, and maximizing the thermal barrier to 147.3 °C and hardness to 1508.3 kgf/mm
2
. SEM and EDAX results were also shown to be improved. Thus, this technique shows that flexibility based on the product application could be tested and established. The expected values and measured values are genuinely close.