The purpose of this research, which was performed at DCT, Inc., in contract with the NASA Lewis Research Center, was to develop an inclusive finite element model to characterize the effects of oxidation on the residual stresses within the TBC system during thermal cycling as well as to examine the interaction of oxidation with the other factors affecting TBC life. The plasma sprayed, two-layer thermal barrier coating that was modeled incorporated a superalloy substrate, a NiCrAlY bond coat, and a ZrO2-8 wt Y2O3 ceramic top coat.

SOURCE: Freborg, A. M.; Ferguson, B. L.; Petrus, G. J.; Brindley, W. J. "Residual Stresses Modeled in Thermal Barrier Coatings." Research and Technology 1997. NASA/TM-1998-206312. NASA Glenn Research Center (April 1998.)

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