Abstract
The general relationship between the excess entropy and enthalpy of segregation is elucidated in terms of basic thermodynamical principles applied to the bulk-interface equilibrium. The linearity reported in several studies of different grain boundary or surface orientations in alloys is accounted for in case at some temperature, the excess entropy varies much more strongly than the ideal solution configurational contribution to the segregation entropy. The theoretical analysis done for monolayer segregation (e.g., of non-metal impurity), shows that the linear relationship can be explicitly quantified by means of a quasi-isotropic interfacial segregation level and the corresponding temperature, and without introducing significant error in case of multilayer segregation.
| Original language | English |
|---|---|
| Pages (from-to) | 267-269 |
| Number of pages | 3 |
| Journal | European Physical Journal B |
| Volume | 22 |
| Issue number | 2 |
| State | Published - 2 Jul 2001 |
Keywords
- 05.70.Np Interface and surface thermodynamics
- 64.75.+g Solubility, segregation, and mixing; phase separation
- 75.50.Bb Fe and its alloys
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics