On the role of Sm in solidification of Al-Sm metallic glasses. (November 2016)

• Record Type: Journal Article
• Authors: Bokas, G.B.; Zhao, L.; Perepezko, J.H.; Szlufarska, I.
• Is Part Of: Scripta materialia. Volume 124(2016)
• Page Start: 99
• Page End: 102
• Publication Date: 2016-11
• Subjects: Metallic glass -- Short-range order -- Molecular dynamics -- Solidification; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.06.045
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: During the solidification of Al-Sm metallic glasses the evolution of the supercooled liquid atomic structure has been identified with an increasing population of icosahedral-like clusters with increasing Sm concentration. These clusters exhibit slower kinetics compared to the remaining clusters in the liquid leading to enhanced amorphous phase stability and glass forming ability (GFA). Maximum icosahedral-ordering and atomic packing density have been found for the Al90 Sm10 and Al85 Sm15 alloys, respectively, whereas minimum cohesive energy has been found for the Al93 Sm7 which is consistent with the range of compositions (from Al92 Sm8 to Al84 Sm16 ) found experimentally with high GFA. Graphical abstract: