Abstract
Abstract The theory of coalescence of vacancy clusters (voids) in the crystal where the point defects are nucleated in pairs has been developed. As the process of fluctuative nucleation and void growth has been the process of small voids dissolving the growth of larger voids at their expense (coalescence) begins. The essential role of interstitial atoms was found at this stage of the process. The interstitial atoms remaining in solution increase the evaporation of small voids and decrease the growth of large voids, partially suppressing vacancy clusters. This leads to a decreased critical radius of void and to a change in the rate of its growth, resulting in a change of void size distribution function shape. An asymptotic void size distribution function shape has been obtained. Its moments, void concentrations, the mean radius and the total volume of voids (crystal swelling) have been found.
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