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

Eric Cavaletti; Sebastien Mercier; Denis Boivin; Marie Pierre Bacos; Pierre Josso; Daniel Monceau

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

Paper Titles

Progress in the Study of the Theory and Practice of High Temperature Protective Coatings in the 22 Years of the Les Embiez Symposia

Erosion and High Temperature Oxidation Resistance of New Coatings Fabricated by a Sol-Gel Route for a TBC Application
p.3

Evolution of Oxide Scales on Aluminide Coatings under Isothermal and Cyclic Conditions
p.11

Improvement of High-Temperature Oxidation of Titanium Alloys by Dipping in a Phosphoric Acid Solution
p.17

Development of a NiW In Situ Diffusion Barrier on a Fourth Generation Nickel-Base Superalloy
p.23

Effect of Material and Environmental Parameters on the Microstructure Evolution and Oxidation Behavior of a Ni-Based Superalloy Coated with a Pt-Modified Ni-Aluminide
p.33

Elaboration of Nickel Aluminide Diffusion Coatings: Application to Oxidation Resistance
p.41

Rumpling of Platinum Modified Aluminide Coatings during Thermomechanical Testing
p.51

The Kinetics of Oxidation of Ru-Bearing Nickel-Based Superalloys
p.59

HomeMaterials Science ForumMaterials Science Forum Vols. 595-598Development of a NiW In Situ Diffusion Barrier on...

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.