Interdiffusion of niobium and molybdenum in nickel between 900-1300 C

Abstract

uperalloys. Both elements improve creep resistance by being strong solid solution strengtheners and precipitation hardeners. Because of their significant role in superalloy metallurgy, there is a need to understand the diffusion behaviour of them in Ni. In the case of Nb, studies are rather rare while for Mo, although considerable volume of data exist, there still is a requirement to establish diffusion coefficients more accurately, over an extended temperature range. The survey of Nb and Mo diffusion described here is part of a wider investigation aimed at accurately establishing binary interdiffusion coefficients in the fcc-Ni phase for a range of transition-series elements.