Design and Development of Smartcoatings for Gas Turbines

RETRACTED: The effect of titanium alloy composition in synthesis of Titania nanotubes

“…The mechanical properties of IMI 834 and other titanium alloys are dependent on variables such as alloy chemistry, manufacturing methods and environmental conditions during the service, since these variables greatly influence the microstructure, which inherently affects their properties. Extensive research on the titanium alloy IMI 834 was carried out under simulated aeroengine conditions by Gurrappa [17][18][19][20][21] and developed high performance and smart coatings to increase its life during service [22][23][24][25][26][27][28][29]. Good amount of research work has been carried out on pure titanium and their alloys like Ti 64, TiNb, TiAl etc.…”

The Importance of Hot Corrosion and Its Effective Prevention for Enhanced Efficiency of Gas Turbines

“…This optimum protection is possible because of the formation of the most suitable protective oxide scale in each temperature range of operation envisaged. In this sense, the coating responds to its environment in a pseudo-intelligent manner and hence the name SMART COATING [102][103]. The smart coating permits operation of gas turbine engines over a wide range of temperatures successfully for more than the designed life and helps in enhancing the efficiency significantly by effectively preventing oxidation, type I and type II hot corrosion.…”

“…The smart coating permits operation of gas turbine engines over a wide range of temperatures successfully for more than the designed life and helps in enhancing the efficiency significantly by effectively preventing oxidation, type I and type II hot corrosion. Such coatings were developed by the principle author and recommended to use for marine, industrial and aero gas turbines ( Fig.18) [102,[104][105]. The Importance of Hot Corrosion and Its Effective Prevention for Enhanced Efficiency of Gas Turbines http://dx.doi.org/10.5772/59124 93…”

“…Therefore, selection of suitable surface engineering techniques to produce a quality coating is extremely essential. Here, selection of a single technique may not be of any help, but a combination of techniques is quite useful [102]. Further, the order of usage of selected techniques is also important as the microstructures of coatings vary and play a significant role in enhancing the life of components.…”

“…The selection of technique for coating preparation should be based on the parameters that are controllable to get required microstructure. As mentioned earlier, the smart coating is a graded coating consisting of different zones (Fig.19) [102]. Each zone has its specific microstructure with definite composition and extends the life of gas turbine engine components significantly.…”