Entropy-Driven Grain Boundary Segregation: Prediction of the Phenomenon

The question is formulated as to whether entropy-driven grain boundary segregation can exist. Such a phenomenon would be based on the assumption that solute segregate at sites exhibit positive energy (enthalpy) if product of entropy and temperature larger than this (enthalpy). possibility discussed for several model examples in iron-based systems, which serve indirect evidence phenomenon. It shown further step beyond recently proposed entropy-dominated it represents “anti-segregation” sites.