Kinetics of phase formation in binary thin films: the Ni/Al case

Formation of porous Ni–Al intermetallics through pressureless reaction synthesis

“…where d represents the diffusion depth, D is interdiffusion coefficient of Al/Ni couple (D = 8 × 10 −18 m 2 s −1 at 600 • C [31]) and t is the diffusion time. When the intermediate such as Ni 2 Al 3 appears, D increases to the value of 1 × 10 −14 m 2 s −1 at 600 • C [32].…”

Low temperature formation of aluminide layers on nanocrystalline nickel

“…This change of growth rate constant could be attributed to the formation of a continuous Al 3 Ni layer. After the formation of Al 3 Ni phase, the growth of overall coating is controlled by the growth of the former phase, because the growth of Al 3 Ni layer is very much slower than Al 3 Ni 2 layer [15].…”

Comparison of the Sauer-Freise and Hall Methods for Obtaining Interdiffusion Coefficients in Binary Alloys

“…The stability condition and convergence criterion for the finite difference solution is given by (e.g. [45,46] ) maxðD n i ÞDt ðDxÞ 2 1 2 . For all cases that were considered in the present paper this parameter was < 0.02.…”

“…They proposed that their iterative method takes less calculation time than other procedures. Garcia et al [45] studied a finite difference scheme to solve the one-dimensional Diffusion Equation with special focus on the stability and convergence of the scheme. They outlined the better numerical methodology and its applicability for a metal-metal system.…”