Development of a NiW In Situ Diffusion Barrier on a Fourth Generation Nickel-Base Superalloy |
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| Journal | Materials Science Forum (Volumes 595 - 598) |
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| Volume | High Temperature Corrosion and Protection of Materials 7 |
| 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 | Eric Cavaletti et al., 2008, Materials Science Forum, 595-598, 23 |
| Online since | September, 2008 |
| Authors | Eric Cavaletti, Sebastien Mercier, Denis Boivin, Marie Pierre Bacos, Pierre Josso, Daniel Monceau |
| Keywords | Bond Coatings, Diffusion, Diffusion Barrier, Electrolytic Coating, Secondary Reaction Zone (SRZ), Thermal Barrier System |
| 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. |
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