We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Interfacial Free Energy Controlling Glass-Forming Ability of Cu-Zr Alloys.
- Authors
Dong-Hee Kang; Hao Zhang; Hanbyeol Yoo; Hyun Hwi Lee; Sooheyong Lee; Geun Woo Lee; Hongbo Lou; Xiaodong Wang; Qingping Cao; Dongxian Zhang; Jianzhong Jiang
- Abstract
Glass is a freezing phase of a deeply supercooled liquid. Despite its simple definition, the origin of glass forming ability (GFA) is still ambiguous, even for binary Cu-Zr alloys. Here, we directly study the stability of the supercooled Cu-Zr liquids where we find that Cu64Zr36 at a supercooled temperature shows deeper undercoolability and longer persistence than other neighbouring compositions with an equivalent driving Gibbs free energy. This observation implies that the GFA of the Cu-Zr alloys is significantly affected by crystal-liquid interfacial free energy. In particular, the crystal-liquid interfacial free energy of Cu64Zr36 in our measurement was higher than that of other neighbouring liquids and, coincidently a molecular dynamics simulation reveals a larger glass-glass interfacial energy value at this composition, which reflects more distinct configuration difference between liquid and crystal phase. The present results demonstrate that the higher crystal-liquid interfacial free energy is a prerequisite of good GFA of the Cu-Zr alloys.
- Subjects
SUPERCOOLED liquids; FREE energy (Thermodynamics); AMALGAMATION; MOLECULAR dynamics; ALLOYS
- Publication
Scientific Reports, 2014, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep05167