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On the meaning of the impingement parameter in kinetic equations of diffusion controlled reactions

Starink, M.J. (2001) On the meaning of the impingement parameter in kinetic equations of diffusion controlled reactions Journal of Materials Science, 36, (18), pp. 4433-4441. (doi:10.1023/A:1017974517877).

Record type: Article


If certain preconditions are met, the Johnson-Mehl-Avrami-Kolmogorov (JMAK) kinetic equation is exactly accurate for nucleation and growth reactions with linear growth and is, at least, a good approximation for nucleation and growth reactions with parabolic growth. These preconditions include randomly distributed product phases, isotropic growth and constant equilibrium state. Mechanisms causing deviations from these preconditions include: capillarity effect, vacancy annihilation, blocking due to anisotropic growth. It is shown that deviations lead to a modification of the overall transformation, which can be approximated well by a single equation. ...... The factors which influence the impingement parameter are discussed.

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Published date: 2001
Keywords: precipitation, kinetics, diffusion, JMAK, model


Local EPrints ID: 18827
ISSN: 0022-2461
PURE UUID: 12cbf691-a7d7-4b57-b8eb-82736a3cd97e

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Date deposited: 09 Dec 2005
Last modified: 17 Jul 2017 16:34

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