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Communication Dans Un Congrès Année : 2007

Adhesion Degradation of a YPSZ EBPVD Layer in Two Thermal Barrier Coating Systems

Résumé

In order to understand the degradation of thermal barrier coating (TBC) systems better, we determined the adhesion energy (Gc) between the bond coat and the top coat and its evolution during cyclic oxidation. This energy was evaluated by means of a modified four-point bending test. The systems tested consist of a YPSZ (7 wt.%Y2O3–ZrO2) EB-PVD ceramic top coat deposited on a single-crystal AM1 superalloy substrate protected with either a β-(Ni, Pt)Al bond coat or a newly developed Zr-doped β-NiAl bond coat. Although the results show a similar adhesion evolution for both systems, different microstructural degradations are involved.
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hal-00194751 , version 1 (25-04-2023)

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Pierre-Yvan Théry, Martine Poulain, Michel Dupeux, Muriel Braccini. Adhesion Degradation of a YPSZ EBPVD Layer in Two Thermal Barrier Coating Systems. 34th International Conference and Metallurgical Coatings and Thin Films (ICMCTF 2007), Apr 2007, San Diego, United States. pp.648-652, ⟨10.1016/j.surfcoat.2007.06.014⟩. ⟨hal-00194751⟩
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