Studies on Plasma Sprayed Thermal Barrier Coating with Increase in Coating Thickness

Abstract

In this study, the nature of performance test like a bond test, wear test and hot corrosion test and its effects on plasma sprayed Yttriastabilized zirconia and Al2O3 composite (50:50 compositions) coating on Aluminium 6061 substrate are carried out. The three topcoat thicknesses of 100µm, 200µm, and 300µm are used for the studies. In case of hot corrosion test, the substrates were spread by molten salt (55wt.% V2O5+45wt.%Na2SO4) which is kept in the furnace at 350 °C for 40 hours. The properties changed for the different bond thickness where for 200 µm wear properties become optimal and 300 µm the corrosion test remains optimal. There is an improvement in the bond strength and its optimal value is obtained for 100 µm topcoat thickness. The physics behind all three experiments are explained in this paper.

Thermal Barrier Coatings for High-Temperature Performance of Nickel-Based Superalloys: A Synthetic Review

“…Damage of the TBC coating can also occur due to insufficient adhesion between the BC and substrate. Since operation at elevated temperature leads to coating peeling or delamination, qualitative tests should be also carried out on the bond (adhesive or cohesive) at the interface between the bonding layer and the topcoat [89]. Kukla et al [90] assessed the adhesion of the CVD-deposited aluminide coating on MAR 247 alloy.…”

Optimizing wear analysis of plasma sprayed Linz-Donawitz slag-Al2O3 coatings using experimental design and neural network

“…This technique is broadly used in wear related applications. [10][11][12] It can also be used for structural purpose. 13,14 In the present time, plasma spray plays a crucial role in many areas such as steel industry, automotive industry, medical industry, hydraulic industry, glass industry etc.…”