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The document provides a detailed explanation of heterogeneous nucleation, contrasting it with homogeneous nucleation, and discusses two specific cases: grain boundary nucleation and free surface nucleation. It outlines the geometric and energy balance considerations for each case, including the derivation of free energy changes and the shape factors involved. The document concludes that nucleation occurs first at the site with the smallest shape factor, which requires less undercooling.

Author

basetsakhizada054

Language

EN