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| Thermal Cycling Behavior of Thermal Bar r ier Coatings Pr epar ed by EB-PVD |
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Abstract The bond coat of NiCoCrAlY and top coat of Y2O3 partially stabilized ZrO2 are deposited at different preheating temperatures of substrate by using electron beam physical vapor deposition ( EB- PVD) technology. Thermal cycling test of sample is performed. The microstructure changes of thermal barrier coatings
during the thermal cycling is observed and the difference between thermal cycling oxidation and continuous constant temperature oxidation is analyzed. The failure mechanism during this thermal cycling is put forward.
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2008, 
