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).

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Description/Abstract

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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1023/A:1017974517877
ISSNs: 0022-2461 (print)
Keywords: precipitation, kinetics, diffusion, JMAK, model
Subjects:
ePrint ID: 18827
Date :
Date Event
2001Published
Date Deposited: 09 Dec 2005
Last Modified: 16 Apr 2017 23:08
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/18827

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