The Role of Bond Coat in Advanced Thermal Barrier Coating

Abstract:

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A novel diffusion barrier bond coat with a duplex layer structure, a sigma phase Re-Cr-Ni barrier and Ni aluminides as an aluminum reservoir was formed on a Ni based superalloy (TMS 82+) and Hastelloy X. The oxidation behavior of both alloys with and without the sigma- Re-Cr-Ni -phase as a diffusion barrier was investigated at temperatures of 1373K (Hastelloy X) and 1423K (TMS-82+) for up to 360ks. It was found that the Re-Cr-Ni acts as a diffusion barrier for both inward diffusion of Al and outward diffusion of alloying elements in the alloy substrate.

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Periodical:

Edited by:

Masaaki Naka and Toshimi Yamane

Pages:

99-104

DOI:

10.4028/www.scientific.net/MSF.502.99

Citation:

T. Narita et al., "The Role of Bond Coat in Advanced Thermal Barrier Coating ", Materials Science Forum, Vol. 502, pp. 99-104, 2005

Online since:

December 2005

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$35.00

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