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Development of a NiW in-situ diffusion barrier on a fourth generation nickel-base superalloy

Cavaletti, Eric and Mercier, Stéphane and Boivin, Denis and Bacos, M.P and Josso, P. and Monceau, Daniel Development of a NiW in-situ diffusion barrier on a fourth generation nickel-base superalloy. (2008) Materials Science Forum, vol. 595 - 5 . pp. 23-32. ISSN 0255-5476

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.595-598.23

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.

Item Type:Article
Additional Information:Thanks to Trans Tech Publications editor. The definitive version is available at http://www.scientific.net The original PDF of the article can be found at Materials Science Forum website : http://www.scientific.net/MSF/
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
French research institutions > Office National d'Etudes et Recherches Aérospatiales - ONERA
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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