Transonic dislocation propagation in diamond
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- Osaka Univ., Suita (Japan); Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Osaka Univ., Suita (Japan)
- Stanford Univ., CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Ecole Polytechnique, Palaiseau (France); Univ. Paris-Saclay, Palaiseau (France); Sorbonne Univ., Palaiseau (France); Inst. Polytechnique de Paris, Palaiseau (France)
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo (Japan); RIKEN SPring-8 Center, Sayo (Japan)
- Osaka Univ., Suita (Japan); Ecole Polytechnique, Palaiseau (France); Univ. Paris-Saclay, Palaiseau (France); Sorbonne Univ., Palaiseau (France); Inst. Polytechnique de Paris, Palaiseau (France)
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- RIKEN SPring-8 Center, Sayo (Japan)
- Nagoya Univ. (Japan)
- Culham Science Centre, Abingdon (United Kingdom)
- Stanford Univ., CA (United States)
Here, the motion of line defects (dislocations) has been studied for more than 60 years, but the maximum speed at which they can move is unresolved. Recent models and atomistic simulations predict the existence of a limiting velocity of dislocation motion between the transonic and subsonic ranges at which the self-energy of dislocation diverges, though they do not deny the possibility of the transonic dislocations. We used femtosecond x-ray radiography to track ultrafast dislocation motion in shock-compressed single-crystal diamond. By visualizing stacking faults extending faster than the slowest sound wave speed of diamond, we show the evidence of partial dislocations at their leading edge moving transonically. Understanding the upper limit of dislocation mobility in crystals is essential to accurately model, predict, and control the mechanical properties of materials under extreme conditions.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Air Force Office of Scientific Research (AFOSR); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2348996
- Report Number(s):
- LLNL-JRNL-863161; 1094732
- Journal Information:
- Science, Journal Name: Science Journal Issue: 6666 Vol. 382; ISSN 0036-8075
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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