A simple way of describing the diffusion phase growth in cylindrical and spherical samples
1993; American Institute of Physics; Volume: 73; Issue: 10 Linguagem: Inglês
10.1063/1.353805
ISSN1520-8850
AutoresAndriy Gusak, Mykhaylo V. Yarmolenko,
Tópico(s)Microstructure and mechanical properties
ResumoIt is shown that during diffusional growth of the intermediate phase between substances A and B for cylindrical and spherical samples, the total diffusion flux relative to the center, −S(r)D̃∂c/∂r, where S is the area of the interface, varies by a small amount in the radial direction, despite the concentration dependence of the interdiffusion coefficient D̃(c). In this context we propose a constant-flux method which allows the kinetics of the diffusional phase growth in cylindrical and spherical samples to be described in a rather simple way. Deviations from the parabolic law of phase growth in cylindrical and spherical samples are analyzed.
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