The Evolution of Thermal Barrier Coatings in Gas Turbine Engine Applications

[+] Author and Article Information
S. M. Meier, D. K. Gupta

Pratt & Whitney, East Hartford, CT 06109

J. Eng. Gas Turbines Power 116(1), 250-257 (Jan 01, 1994) (8 pages) doi:10.1115/1.2906801 History: Received February 21, 1992; Online April 24, 2008


Thermal barrier coatings (TBCs) have been used for almost three decades to extend the life of combustors and augmentors and, more recently, stationary turbine components. Plasma-sprayed yttria-stabilized zirconia TBC currently is bill-of-material on many commercial jet engine parts. A more durable electron beam-physical vapor deposited (EB-PVD) ceramic coating recently has been developed for more demanding rotating as well as stationary turbine components. This ceramic EB-PVD is bill-of-material on turbine blades and vanes in current high thrust engine models and is being considered for newer developmental engines as well. To take maximum advantage of potential TBC benefits, the thermal effect of the TBC ceramic layer must become an integral element of the hot section component design system. To do this with acceptable reliability requires a suitable analytical life prediction model calibrated to engine experience. The latest efforts in thermal barrier coatings are directed toward correlating such models to measured engine performance.

Copyright © 1994 by The American Society of Mechanical Engineers
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