Volume conservation in bulk metallic glasses

Journal Article · Sun Dec 31 23:00:00 EST 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2751595· OSTI ID:983533

Ma, Dong ^[1]; Stoica, Alexandru Dan ^[1]; Wang, Xun-Li ^[1]

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1. ORNL

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.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL work for others
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 983533
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 91; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BONDING
EFFICIENCY
GLASS
METALLIC GLASSES
atomic structure
metallic glasses