Inelastic response of silicon to shock compression.

Autor: Higginbotham A; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK., Stubley PG; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK., Comley AJ; Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR, UK., Eggert JH; Lawrence Livermore National Laboratory, Livermore, CA 94551, USA., Foster JM; Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR, UK., Kalantar DH; Lawrence Livermore National Laboratory, Livermore, CA 94551, USA., McGonegle D; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK., Patel S; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK., Peacock LJ; Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR, UK., Rothman SD; Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR, UK., Smith RF; Lawrence Livermore National Laboratory, Livermore, CA 94551, USA., Suggit MJ; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK., Wark JS; Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2016 Apr 13; Vol. 6, pp. 24211. Date of Electronic Publication: 2016 Apr 13.
DOI: 10.1038/srep24211
Abstrakt: The elastic and inelastic response of [001] oriented silicon to laser compression has been a topic of considerable discussion for well over a decade, yet there has been little progress in understanding the basic behaviour of this apparently simple material. We present experimental x-ray diffraction data showing complex elastic strain profiles in laser compressed samples on nanosecond timescales. We also present molecular dynamics and elasticity code modelling which suggests that a pressure induced phase transition is the cause of the previously reported 'anomalous' elastic waves. Moreover, this interpretation allows for measurement of the kinetic timescales for transition. This model is also discussed in the wider context of reported deformation of silicon to rapid compression in the literature.
Databáze: MEDLINE
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