skip to main content

SciTech ConnectSciTech Connect

Title: Microscopic insight into the origin of enhanced glass-forming ability of metallic melts on micro-alloying

Extensive efforts have been made to develop metallic-glasses with large casting diameter. Such efforts were hindered by the poor understanding of glass formation mechanisms and the origin of the glass-forming ability (GFA) in metallic glass-forming systems. In this work, we have investigated relaxation dynamics of a model bulk glass-forming alloy system that shows the enhanced at first and then diminished GFA on increasing the percentage of micro-alloying. The micro-alloying did not have any significant impact on the thermodynamic properties. The GFA increasing on micro-alloying in this system cannot be explained by the present theoretical knowledge. Our results indicate that atomic caging is the primary factor that influences the GFA. The composition dependence of the atomic caging time or residence time is found to be well correlated with GFA of the system.
Authors:
;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong (China)
  2. Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  3. Chemical and Engineering Materials Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  4. Institute of Physics, Chinese Academy of Science, Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22482163
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOY SYSTEMS; CASTING; CASTINGS; GLASS; METALLIC GLASSES; ORIGIN; RELAXATION; THERMODYNAMIC PROPERTIES