Quantitative measure of local solidity/liquidity in metallic glasses

Jun Ding; Yong Qiang Cheng; Evan Ma

doi:10.1016/j.actamat.2013.04.016

Quantitative measure of local solidity/liquidity in metallic glasses

Jun Ding, Yong Qiang Cheng, Evan Ma

Chemical Spectroscopy

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Metallic glasses are viscoelastic materials that contain a wide spectrum of local configurations that range from more "solid-like" to more "liquid-like" varieties. To quantitatively characterize the local solidity (or liquidity) in metallic glasses, here we present a robust method and a universal materials parameter. The new parameter, solidity (liquidity) index, is based on the evaluation of bond orientational anisotropy. The usefulness of the proposed index in assessing the varying degrees of solidity (or liquidity) is demonstrated in metallic glass models produced via molecular dynamics simulations. The spectrum of local solidity is also analyzed in terms of its dependence on local structural features, particularly on the basis of different types of Voronoi polyhedra and atomic volume.

Original language	English
Pages (from-to)	4474-4480
Number of pages	7
Journal	Acta Materialia
Volume	61
Issue number	12
DOIs	https://doi.org/10.1016/j.actamat.2013.04.016
State	Published - Jul 2013

Funding

This work was supported by the US National Science Foundation, Division of Materials Research, under Contract No. NSF-DMR-0904188. Y.Q.C. was supported by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

Funders	Funder number
Scientific User Facilities Division
National Science Foundation
U.S. Department of Energy
Division of Materials Research	NSF-DMR-0904188
Basic Energy Sciences

Keywords

Metallic glasses
Molecular dynamics
Solidity/liquidity
Structural anisotropy

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10.1016/j.actamat.2013.04.016

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abstract = "Metallic glasses are viscoelastic materials that contain a wide spectrum of local configurations that range from more {"}solid-like{"} to more {"}liquid-like{"} varieties. To quantitatively characterize the local solidity (or liquidity) in metallic glasses, here we present a robust method and a universal materials parameter. The new parameter, solidity (liquidity) index, is based on the evaluation of bond orientational anisotropy. The usefulness of the proposed index in assessing the varying degrees of solidity (or liquidity) is demonstrated in metallic glass models produced via molecular dynamics simulations. The spectrum of local solidity is also analyzed in terms of its dependence on local structural features, particularly on the basis of different types of Voronoi polyhedra and atomic volume.",

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N2 - Metallic glasses are viscoelastic materials that contain a wide spectrum of local configurations that range from more "solid-like" to more "liquid-like" varieties. To quantitatively characterize the local solidity (or liquidity) in metallic glasses, here we present a robust method and a universal materials parameter. The new parameter, solidity (liquidity) index, is based on the evaluation of bond orientational anisotropy. The usefulness of the proposed index in assessing the varying degrees of solidity (or liquidity) is demonstrated in metallic glass models produced via molecular dynamics simulations. The spectrum of local solidity is also analyzed in terms of its dependence on local structural features, particularly on the basis of different types of Voronoi polyhedra and atomic volume.

AB - Metallic glasses are viscoelastic materials that contain a wide spectrum of local configurations that range from more "solid-like" to more "liquid-like" varieties. To quantitatively characterize the local solidity (or liquidity) in metallic glasses, here we present a robust method and a universal materials parameter. The new parameter, solidity (liquidity) index, is based on the evaluation of bond orientational anisotropy. The usefulness of the proposed index in assessing the varying degrees of solidity (or liquidity) is demonstrated in metallic glass models produced via molecular dynamics simulations. The spectrum of local solidity is also analyzed in terms of its dependence on local structural features, particularly on the basis of different types of Voronoi polyhedra and atomic volume.

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Quantitative measure of local solidity/liquidity in metallic glasses

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Keywords

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