Abstract
A theoretical model of the diffusion process is described. The model allows us to interpret the peritectic transformation and the growth of a globular eutectic. Formulae are derived that relate the dimensions of the phases participating in the transformation to the duration of the transformation, the degree of undercooling, and the diffusion coefficient of a constituent in the intermediate phase. Calculations are given that illustrate for isothermal conditiones the effects of the initial dimension of the pre-peritectic or pre-eutectic phase, the degree of undercooling, and the diffusion coefficient on the kinetics of peritectic and eutectic transformations.
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