Nanoscale damage during fracture in silica glass

Details Nanoscale damage during fracture in silica glass Nanoscale damage during fracture in silica glass

2006-08-31

arxiv.org/abs/cond-mat/0608730v1

International Journal of Fracture 140 (2006) 3-13

Physics

Condensed Matter

Statistical Mechanics

12 pages

Scientific paper

We report here atomic force microscopy experiments designed to uncover the nature of failure mechanisms occuring within the process zone at the tip of a crack propagating into a silica glass specimen under stress corrosion. The crack propagates through the growth and coalescence of nanoscale damage spots. This cavitation process is shown to be the key mechanism responsible for damage spreading within the process zone. The possible origin of the nucleation of cavities, as well as the implications on the selection of both the cavity size at coalescence and the process zone extension are finally discussed.

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