Polyamorphism in the silica glass

被引：13

作者：

Hung, P. K. ^{[1
]}

Nhan, N. T. ^{[1
]}

机构：

[1] Hanoi Univ Technol, Dept Computat Phys, Hanoi, Vietnam

来源：

SCRIPTA MATERIALIA | 2010年 / 63卷 / 01期

关键词：

Silica; Void; Glass; Cluster; INDUCED COORDINATION CHANGES; VITREOUS SIO2; HIGH-PRESSURE; GEO2; GLASSES; LIQUID; CRYSTALLINE; DIFFRACTION; TRANSITION; SCATTERING;

D O I：

10.1016/j.scriptamat.2010.02.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A molecular dynamics (MD) simulation has been carried out to explore the polymorphic states of silica glass under ambient pressure. We show for the first time that the simulated glass is composed of atomic clusters of type C(4), C(5) and C(6). Densification is performed via gradual variation in the volume of those clusters. The total volume of the MD model and the void volume are found to be a linear function of the fraction of SiO(x) units with x = 4, 5 and 6. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：12 / 15

页数：4

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