Journal
SCRIPTA MATERIALIA
Volume 75, Issue -, Pages 14-17Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.10.018
Keywords
Dynamic crack propagation; Surface instabilities; Brittle crystals; Crystallographic defects
Categories
Funding
- European Commission ADGLASS FP7 project
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The origin of micron-scale ridge-like fracture surface instabilities on the {1 1 1} low-energy cleavage plane of silicon crystal was elucidated by fracture experiments and surface analyses by scanning tunneling microscopy under ultra-high vacuum. These investigations show that when a low-speed crack collides with individual boron atoms along the crack front, atomic-height jogs are generated, gradually growing by pile-up mechanisms to over three orders of magnitude in height by forming ridges. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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