Forced-air diffusion
Diffusion in metals

Article REF: M55 V3

Forced-air diffusion
Diffusion in metals

Author : Pierre GUIRALDENQ

Publication date: April 10, 1994 | Lire en français

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4. Forced-air diffusion

Thermally activated diffusion, hitherto considered as a set of atomic jumps within a crystal lattice and governed by Fick's law, can be modified by the presence of external forces. These can be chemical, mechanical, electrical or thermal in nature. They therefore lead to the general expression of the flux $\dot{J}$ , which can be written as : $\dot{J} = - D \frac{\partial c}{\partial x} + c < v >_{F}$

with :

...

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References

(1) - ZENER (C.) - Journal of Applied Physics, 22, p. 372 (1951).
(2) - WERT (C.), ZENER (C.) - Coefficients de diffusion atomique interstitielle. - Phys. Review, 76, p. 1169 (1949).
(3)...

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