A simple way of describing the diffusion phase growth in cylindrical and spherical samples

Gusak, A. M., Yarmolenko, M. V. (1993) A simple way of describing the diffusion phase growth in cylindrical and spherical samples. Journal of Applied Physics, Т. 73 (№ 10). с. 4881-4884.

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Резюме

It is shown that during diffusional growth of the intermediate phase between substancesA and B for cylindrical and spherical samples, the total diffusion flux relative to the center, -S(r)D~3c/&~ where S is the area of the interface, varies by a small amount in the radial direction, despite the concentration dependenceof the interdiffusion coefficient D(c). In this context we proposea constant-flux met.hodwhich allows the kinetics of the diffusional phase growth in cylindrical and spherical samplesto be describedin a rather simple way. Deviations from the parabolic law of phasegrowth in cylindrical and spherical samplesare analyzed

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