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- W2024365518 abstract "We evaluate the square-root diffusivity method as implemented in a new computer program Profiler developed by Brockman and Morral in 1993 to model interdiffusion of components in multicomponent alloys, a process which is of great importance in the materials sciences. Two multicomponent alloys joined along a planar interface form a classical one-dimensional diffusion couple in which the flux of any given component is affected by the flux of the others. A special relationship exists between the spatial extent of penetration of the various diffusing species and the square root of time, from which the usefulness of the square root of the diffusivity matrix becomes evident. Profiler, written in Turbo Pascal for use on personal computers, calculates the variation, with time and distance, of the concentrations of the n species diffusing across the interface of the single-phase diffusion couple using the square-root diffusivity method. Diffusion profiles calculated by Profiler are compared to the published experimental data of Thompson et al. in 1990 and Dayananda and Kim in 1979. Profiler is also used to investigate diffusion paths as a function of ternary alloy concentration in Cu-Ni-Zn couples. We conclude that Profiler accurately predicts the form of the two independent diffusion fields (e.g. predicting the existence or absence of extrema in the penetration curves). The slopes of the diffusion profiles and the precise location of compositional extrema are, however, shown to be dependent upon the accuracy of the alloy thermodynamic data selected by the user. Profiler is especially useful as a survey tool for estimating the potential occurrence and magnitude of compositional extrema and other peculiarities of multicomponent diffusion. In addition, the interpretation of diffusion penetration data obtained from electron microprobe analysis can be enhanced by prior knowledge that compositional extrema may occur within multicomponent diffusion zones." @default.
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- W2024365518 date "1995-09-01" @default.
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- W2024365518 title "Multicomponent diffusion: implementation of the square-root diffusivity method via the Profiler computer program" @default.
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- W2024365518 doi "https://doi.org/10.1088/0965-0393/3/5/001" @default.
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