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Effect of Compositional Short Range Order on Glass Formation in Binary Metallic System

Published online by Cambridge University Press:  11 February 2011

Hao Chen ,
Mahadevan Khantha  and
Takeshi Egami
Hao Chen
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pa 19104–6272, U.S.A.
Mahadevan Khantha
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pa 19104–6272, U.S.A.
Takeshi Egami
Affiliation:
Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pa 19104–6272, U.S.A.
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Abstract

Molecular Dynamics simulation was carried out to study the glass transition and crystallization in the metal-metalloid binary system with pair-wise potentials. The results show that a repulsive potential between metalloid (small) atoms increases the glass forming ability. The observation is consistent with the recent theory of bulk metallic glass formation through local glass transition and nano-glass formation. The theory predicted that the compositional short-range order (CSRO) prevents the small atom pairing so as to increase the glass forming ability (GFA). The present results demonstrate the important role of CSRO in bulk metallic glass formation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 754: Symposium CC – Supercooled Liquids, Glass Transition and Bulk Metallic Glasses , 2002 , CC6.16
Copyright
Copyright © Materials Research Society 2003

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References

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