Interdiffusion Between Ni-Based Superalloy and MCrAlY Coating
Interdiffusion at the interface between a Co-36.5Ni-17.5Cr-8Al-0.5Y, MCrAlY coating and the underlying IN738 superalloy was studied in a large matrix of specimens isothermally heat treated for up to 12,000 hours at temperatures 875°C, 925°C or 950°C. Modelled results using the finite difference software DICTRA was compared with experimental average composition profiles measured across the interface using a new experimental approach.
Andreas Öchsner and José Grácio
K.V. Dahl et al., "Interdiffusion Between Ni-Based Superalloy and MCrAlY Coating", Defect and Diffusion Forum, Vols. 258-260, pp. 73-78, 2006