2012
DOI: 10.1063/1.3686435
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Spall strength of sapphire

Abstract: Abstract. The spall strength of c-cut sapphire has been measured as a function of the load duration and peak stress. In experiments, the VISAR particle velocity histories at the interface between the sapphire samples and a water or LiF window were recorded. The peak shock stress was varied from 17.3 GPa up to 21.4 GPa that is below the Hugoniot elastic limit (HEL) but close to it, the load duration was varied from 100-150 ns to 250-300 ns. The spall strength varies from 4.2 to 10.6 GPa. Results of measurements… Show more

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