Interaction of voids and nanoductility in silica glass

被引：62

作者：

Chen, Yi-Chun ^{[1
]}

Lu, Zhen ^{[1
]}

Nomura, Ken-Ichi ^{[1
]}

Wang, Weiqiang ^{[1
]}

Kalia, Rajiv K. ^{[1
]}

Nakano, Aiichiro ^{[1
]}

Vashishta, Priya ^{[1
]}

机构：

[1] Univ So Calif, Collaboratory Adv Comp & Simulat, Los Angeles, CA 90089 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.99.155506

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Multimillion-to-billion-atom molecular dynamics simulations are performed to investigate the interaction of voids in silica glass under hydrostatic tension. Nanometer size cavities nucleate in intervoid ligaments as a result of the expansion of Si-O rings due to a bond-switching mechanism, which involves bond breaking between Si-O and bond formation between that Si and a nonbridging O. With further increase in strain, nanocracks form on void surfaces and ligaments fracture through the growth and coalescence of ligament nanocavities in a manner similar to that observed in ductile metallic alloys.

引用

页数：4

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