Large Local Deflections of a Dynamic Crack Front Induced by Intrinsic Dislocations in Brittle Single Crystals

D. Shilo, D. Sherman, I. Beery, E. Zolotoyabko

Research output: Contribution to journalArticlepeer-review

Abstract

We show that intrinsic dislocations in brittle single crystals can be a source of strong local perturbations along the crack path. A theoretical model was developed which predicts substantial crack front deflections. Investigating the crack surfaces in Si crystals with induced dislocation density of [Formula presented] revealed a significant amount of crack front perturbations in the form of V-shaped grooves, which were completely missing in dislocation-free Si specimens. The measured depths of the perturbations were in the range of 2–20 nm and in excellent agreement with the theoretical model.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number23
DOIs
StatePublished - 2002
Externally publishedYes

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