Sound speed measurements in zirconium using the front surface impact technique

We have performed a series of experiments impacting zirconium samples of varying purity level directly onto lithium fluoride (LiF) windows to determine both the Hugoniot and sound speed as a function of stress up to 70 GPa. This front surface impact (FSI) geometry is useful for determining sound spe...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.500 (3), p.32014-6
Main Authors: Rigg, P A, Saavedra, R A, Scharff, R J
Format: Article
Language:English
Subjects:
Correlation
Experiments
Lithium
Lithium fluoride
Longitudinal waves
Phase transformations
Phase transitions
Physics
Purity
Rarefaction
Sound
Wave interaction
Zirconium
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Summary:We have performed a series of experiments impacting zirconium samples of varying purity level directly onto lithium fluoride (LiF) windows to determine both the Hugoniot and sound speed as a function of stress up to 70 GPa. This front surface impact (FSI) geometry is useful for determining sound speed in shock-compression experiments because wave interactions are mostly eliminated and multiple sample thicknesses are not needed in each experiment. The experimental results show two kinks in the sound speed which correlate well with the location of the α → ω and ω → β transitions, respectively. A rarefaction shock also forms in the release wave in experiments conducted at 31 GPa giving further evidence that this phase transition is being observed.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/500/3/032014