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Phys Rev Lett. 2008 Aug 8;101(6):065701. Epub 2008 Aug 8.

Ultrafast dynamic compression technique to study the kinetics of phase transformations in bismuth.

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  • 1Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.

Abstract

Preheated Bi (296-532 K) was ramp compressed with 15-35 ns rise times to a peak stress of approximately 11 GPa to explore structural phase-transformation kinetics under dynamic loading conditions. At high strain rates, epsilon[over ]>5 x 10;{6} s;{-1}, deviation from equilibrium phase boundaries suggests that compression time scales are comparable to the new phase incubation period. The dependence of DeltaP/kT on epsilon[over ] is consistent with a thermally activated transformation.

PMID:
18764477
DOI:
10.1103/PhysRevLett.101.065701
[PubMed]
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