Solute segregation at ordered grain boundaries

A simple phenomenological model of solute segregation at partially ordered grain boundaries is proposed. It is consistent with present understanding o f equilibrium segregation phenomena. The model is used to correlate complex concentration and temperature dependences of silicon segregation in ordere d Fe-Si alloys. It also offers a new interpretation of boron segregation in FeAl base intermetallics as well as interesting consequences of nickel seg regation in ordered NiAl solid solutions. (C) 2001 Elsevier Science B.V. Al l rights reserved.