M. Dupeux et al., APPLICATION OF BINARY INTERDIFFUSION MODELS TO GAMMA'(NI3AL) GAMMA(NI) DIFFUSION-BONDED INTERFACES/, Acta metallurgica et materialia, 41(11), 1993, pp. 3071-3076
Nickel and Ni3Al platelets have been joined by diffusion solid state b
onding with two different sets of bonding parameters (applied pressure
, temperature, duration). The gamma/gamma' interfaces obtained are exa
mined and the transverse concentration profiles are determined. The ap
plication of the classical binary interdiffusion models to this partic
ular case is discussed, with increasingly refined hypotheses. A step-b
y-step numerical calculation procedure is finally proposed which is ab
le to account correctly for the measured profiles at the highest annea
ling temperature (1100-degrees-C). To apply this procedure an experime
ntal determination of the interdiffusion coefficients of Al in the pha
ses gamma and gamma' as functions of the local concentration was made
according to Matano's method.