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Title: Volume conservation in bulk metallic glasses

Abstract

We report that the excess molar volumes of mixing for ~30 metalloid-free bulk metallic glasses (BMGs) are essentially zero, indicating that the original volumes of "mechanically mixed" constituent elemental metals are conserved after glass formation. This is attributed to the lack of solute-solute bonds and the ideal-mixing nature of solvent-solute bonding upon amorphization. The hard-sphere atomic packing fractions of most of these BMGs are found to be ~0.74, comparable to the maximum packing efficiency for close-packed structures. These findings provide a new perspective for understanding amorphous structures.

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Work for Others (WFO)
OSTI Identifier:
983533
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 91; Journal Issue: 2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BONDING; EFFICIENCY; GLASS; METALLIC GLASSES; metallic glasses; atomic structure

Citation Formats

Ma, Dong, Stoica, Alexandru Dan, and Wang, Xun-Li. Volume conservation in bulk metallic glasses. United States: N. p., 2007. Web. doi:10.1063/1.2751595.
Ma, Dong, Stoica, Alexandru Dan, & Wang, Xun-Li. Volume conservation in bulk metallic glasses. United States. doi:10.1063/1.2751595.
Ma, Dong, Stoica, Alexandru Dan, and Wang, Xun-Li. Mon . "Volume conservation in bulk metallic glasses". United States. doi:10.1063/1.2751595.
@article{osti_983533,
title = {Volume conservation in bulk metallic glasses},
author = {Ma, Dong and Stoica, Alexandru Dan and Wang, Xun-Li},
abstractNote = {We report that the excess molar volumes of mixing for ~30 metalloid-free bulk metallic glasses (BMGs) are essentially zero, indicating that the original volumes of "mechanically mixed" constituent elemental metals are conserved after glass formation. This is attributed to the lack of solute-solute bonds and the ideal-mixing nature of solvent-solute bonding upon amorphization. The hard-sphere atomic packing fractions of most of these BMGs are found to be ~0.74, comparable to the maximum packing efficiency for close-packed structures. These findings provide a new perspective for understanding amorphous structures.},
doi = {10.1063/1.2751595},
journal = {Applied Physics Letters},
number = 2,
volume = 91,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}