2003/02/28 by Christian Marli re, C. Marliere, S. Prades +9 · 20 citations
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advanced Surface Polishing Techniques #Amorphous solid #Atomic force microscopy #Chemistry #Coalescence (physics) #Composite material #Crystallography #Fracture (geology) #Fracture mechanics #Glass properties and applications #Laser Material Processing Techniques #Length scale #Materials science #Mechanics #Nanometre #Nanoscopic scale #Nanotechnology #Nucleation #Optics #Physics #Thermodynamics #cond-mat
paper · pdf · doi:10.1088/0953-8984/15/31/313
published in Journal of Physics Condensed Matter 15(31), S2377-S2386 (IOP Publishing) · 12 pages, 8 figures, submitted to Journal of Physics: Condensed Matter; Invited talk at Glass and Optical Materials Division Fall 2002 Meeting, Pittsburgh, Pa, USA
openalex publication_date 2003/07/23 · arxiv created 2003/09/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have studied the low-speed fracture regime for different glassy materials with variable but controlled length scales of heterogeneity in a carefully controlled surrounding atmosphere. By using optical and atomic force microscopy techniques, we tracked, in real-time, the crack tip propagation at the nanometre scale over a wide velocity range (10 −3 –10 −12 m s −1 and below). The influence of the heterogeneities on this velocity is presented and discussed. Our experiments reveal also—for the first time—that the crack progresses through nucleation, growth and coalescence of nanometric damage cavities within the amorphous phase. This may explain the large fluctuations observed in the crack tip velocities for the smallest values. This behaviour is very similar to that involved, at the micrometric scale, in ductile fracture. The only difference is very probably due to the related length scales (nanometric instead of micrometric). The consequences of such a nano-ductile fracture mode observed at a temperature far below the glass transition temperature, T g , in glass is also discussed.