title: Mg segregation at Al/Al3Sc heterophase interfaces on an atomic scale: experiments and computations.
abstract: Microscopic factors governing solute partitioning in ternary two-phase Al-Sc-Mg alloys are investigated combining three-dimensional-atom-probe (3DAP) microscopy measurements with first-principles computations. 3DAP is employed to measure composition profiles with subnanometer-scale resolution, leading to the identification of a large enhancement of Mg solute at the coherent alpha-Al/Al(3)Sc (fcc/L1(2)) heterophase interface. First-principles calculations establish an equilibrium driving force for this interfacial segregation reflecting the nature of the interatomic interactions.
authors.affiliation: Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: E A
authors.initials: EA
authors.lastname: Marquis
authors.forename: D N
authors.initials: DN
authors.lastname: Seidman
authors.forename: M
authors.initials: M
authors.lastname: Asta
authors.forename: C
authors.initials: C
authors.lastname: Woodward
authors.forename: V
authors.initials: V
authors.lastname: Ozoliņs