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| Effect of Surface Treatment on Interface Morphology of Thermal Barrier Coating |
| YANG Wenhui, MU Rende |
| (Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China) |
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Abstract The boat coating of HY5 prepared by arc ion plating was deposited on DD32 alloy substrate. The surface
were treated by vibratory polished (VS) and grit-blasted, and then YSZ was deposited on the bond coating by EB-PVD. The
microstructures of the bond coating by different surface treatments were investigated. The oxidation resistance of TBCs
was measured and compared. Furthermore, effects of surface on interface elementary composition and failure characteristic
were studied. The results indicate that both surface treatments can improve the bond coating surface and lead to better
oxidation resistance. Compared with TBCs treated by vibratory polished (VS) and grit-blasted, the scale morphology was
uniformon flat surfaces. After high temperature oxidation, wrinkling appeared on TGO with rough interface.
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2017, 
