Ceramic Thermal Barrier Coatings For Commercial Gas Turbine Engines

The most advanced thermal barrier coating tbc systems for aircraft engine and power generation hot section components consist of electron beam physical vapor deposition ebpvd applied yttria stabilized zirconia and platinum modified diffusion aluminide bond coating.

Ceramic thermal barrier coatings for commercial gas turbine engines.

Blade integrity is now critically dependent on these coatings and possibly additional ceramic thermal barrier coatings. Thermal barrier coatings tbcs are used to protect the hot sections of gas turbine and jet engines. 1 5 currently commercial standard tbcs are typically two layered structures consisting of a ceramic. Thermal barrier coatings have been used for over 20 years to extend the durability of aircraft gas turbine engine combustors.

Of all these thermal barrier coatings tbcs have the most complex structure and must operate in the most demanding high temperature environment of aircraft and industrial gas turbine engines. Refractory oxide ceramic coatings or tbc s thermal barrier coatings when applied to. Tbcs which comprise metal and ceramic multilayers insulate turbine and combustor engine components from the hot gas stream and improve the durability. Science 296 2002 280 284 themal barrier coatings for gas turbine engine applications.

These engines are used in defense sectors energy and transportation applications. And the more development and research that go into thermal barrier coatings the more benefits and higher efficiencies will be the result. Gas turbine engines and tbc s. A tbc system comprises of a substrate bond coat bc and tbc top coat tc.

Thermally sprayed ceramic and mcraly bond coatings however are still used extensively for combustors and power generation. Thermal barrier coatings tbcs enable the engines to operate at higher temperatures without raising the base metal temperatures using cooling systems inside the hot section components and thus enhance the operating efficiency of the engines therefore continued development of tbcs is essential to increase the inlet gas temperature further for improving the performance of gas turbines. Thermal barrier coatings tbcs are widely used in gas turbines to increase the turbine inlet temperature tit or to reduce cooling requirements thus achieving higher engine efficiency lowering emissions and increasing performance goals. Even for a given application and a given engine different commercial strategies may imply different.