Identification of bulk metallic glass-forming compositions in La-based systems using ultrahigh gravitational acceleration

Two eutectic multicomponent La-based alloys with high glass-forming ability were identified by ultrahigh acceleration centrifugal processing during cooling of compositionally off-eutectic melts. The identified ternary composition, La 64Al 13Cu 23, was cast amorphously to 3 mm in diameter, comparable...

Full description

Saved in:
Bibliographic Details
Published in:Acta materialia 2008-02, Vol.56 (3), p.651-658
Main Authors: Arata, Edward R., Dalla Torre, Florian H., Löffler, Jörg F.
Format: Article
Language:English
Subjects:
Acceleration
Alloys
Applied sciences
Bulk amorphous materials
Cooling
Eutectic composition
Eutectic solidification
Eutectics
Exact sciences and technology
Melts
Metallic glasses
Metals. Metallurgy
Rare earth
Scanning electron microscopy (SEM)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two eutectic multicomponent La-based alloys with high glass-forming ability were identified by ultrahigh acceleration centrifugal processing during cooling of compositionally off-eutectic melts. The identified ternary composition, La 64Al 13Cu 23, was cast amorphously to 3 mm in diameter, comparable to previous studies. The quaternary composition, La 65Al 13Ni 10Cu 12, was cast to 10 mm in diameter, showing the highest glass-forming ability for this system. These results show that instead of extensive traditional alloy development, it is sufficient to study one centrifugally processed sample to discover the composition with the deepest eutectic, which (as predicted by Turnbull) produces good glass-forming ability.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2007.10.026