Development of a NiW In Situ Diffusion Barrier on a Fourth Generation Nickel-Base Superalloy

Abstract:

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A diffusion barrier based on a NiW electrolytic coating has been developed to limit interdiffusion between a Ni-base superalloy (MCNG) and a β-NiAl bondcoating. Isothermal oxidation tests of 50h at 1100°C confirmed that W-rich layer formed with NiW coating modifies the oxidation behaviour of the bondcoat and limits interdiffusion. The diffusion barrier reduced β-NiAl  γ’-Ni3Al transformation in the bondcoating and prevented SRZ formation.

Info:

Periodical:

Materials Science Forum (Volumes 595-598)

Edited by:

Pierre Steinmetz, Ian G. Wright, Alain Galerie, Daniel Monceau and Stéphane Mathieu

Pages:

23-32

DOI:

10.4028/www.scientific.net/MSF.595-598.23

Citation:

E. Cavaletti et al., "Development of a NiW In Situ Diffusion Barrier on a Fourth Generation Nickel-Base Superalloy", Materials Science Forum, Vols. 595-598, pp. 23-32, 2008

Online since:

September 2008

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Price:

$35.00

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