Paper Title:
Development of a NiW In Situ Diffusion Barrier on a Fourth Generation Nickel-Base Superalloy
  Abstract

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, S. Mercier, D. Boivin, M. P. Bacos, P. Josso, D. Monceau, "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
$32.00
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