A comparative study of two-layer NiAl bond coat TBC and its failure mechanism

He Fei Li,Zhao Hui Zhou,A. Hesnawi,Jiang Kuo,Sheng Kai Gong

Key Engineering Materials（2007）

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摘要

Thermal barrier coatings with one-layered/ two-layered NiAl bond coat were produced by electron beam physical vapor deposition (EB-PVD). Compared to the TBC with one-layered bond coat, the TBC with two-layered bond coat improved the thermal cycling resistance significantly. The failure mechanism of the two-layer NiAl bond coat TBC was investigated in this paper.

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thermal cycling,nickel-base superalloy,thermal barrier coatings

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