Growth Kinetics of Plate-Like Precipitates

Abstract

Different models for the growth kinetics of plate‐like precipitates have been critically reviewed. It is shown that the Zener‐Hillert equation does not properly take into consideration the capillarity effect at the advancing interphase boundary. A mathematical treatment of the diffusion controlled steady‐state growth of plate‐like precipitate is presented for the case in which the variation of concentration along the interface is determined from the theory of capillarity. This variation is assumed to be small so that the steady‐state shape does not deviate appreciably from a parabola. Applicability of the present treatment to the growth of a group of plates is then discussed.