Vitrification and Crystallization of Phase-Separated Metallic Liquid

The liquid-liquid phase separation (LLPS) behavior of Fe50Cu50 melt from 3500 K to 300 K with different rapid quenching is investigated by molecular dynamics (MD) simulation based on the embedded atom method (EAM). The liquid undergoes metastable phase separation by spinodal decomposition in the und...

Full description

Saved in:
Bibliographic Details
Published in:Metals (Basel ) 2017-03, Vol.7 (3), p.73
Main Authors: Cheng, Yun, Cui, Wenchao, Wang, Li, Peng, Chuanxiao, Wang, Shenghai, Wang, Yuyang
Format: Article
Language:English
Subjects:
Computer simulation
Cooling
Cooling rate
Crystal structure
Crystallization
Embedded atom method
Fe50Cu50 undercooled melt
Iron
Liquid phases
Metastable phases
Molecular dynamics
Phase separation
Rapid quenching (metallurgy)
Spinodal decomposition
Twinning
twinning plane
Vitrification
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:The liquid-liquid phase separation (LLPS) behavior of Fe50Cu50 melt from 3500 K to 300 K with different rapid quenching is investigated by molecular dynamics (MD) simulation based on the embedded atom method (EAM). The liquid undergoes metastable phase separation by spinodal decomposition in the undercooled regime and subsequently solidifies into three different Fe-rich microstructures: the interconnected-type structure is kept in the glass and crystal at a higher cooling rate, while the Fe-rich droplets are found to crystalize at a lower cooling rate. During the crystallization process, only Fe-rich clusters can act as the solid nuclei. The twinning planes can be observed in the crystal and only the homogeneous atomic stacking shows mirror symmetry along the twinning boundary. Our present work provides atomic-scale understanding of LLPS melt during the cooling process.
ISSN:2075-4701
2075-4701
DOI:10.3390/met7030073