A Shock-Induced Phase Transformation in Bismuth

Abstract

A study was made of the shock-induced phase transformation in bismuth at 25 kbar. A quartz pressure-gauge technique was used to obtain the experimental data. A previously reported disagreement between the dynamic and the static transition pressure is due in part to a strength-of-material correction. The remaining discrepancy is probably due to a systematic error in the earlier dynamic study. The observed dynamic transition pressures corrected for strength-of-material effects and corrected to 25°C were 25.4 kbar for isotropic bismuth, and 25.9 kbar for cast bismuth. These values agree nicely with the value 25.4 kbar obtained by static compression. Hugoniot elastic limits of 2.4 to 3.1 kbar were observed for the different types of samples.

Experimental investigation of the shock response of bismuth under one-dimensional shock-loading

“…In addition to the clear phase transition, it is also worth noting that an additional slight inflection on the rear gauge rise appears to be apparent at ~0.14 GPa. While only a nominal effect, this is consistent with room temperature Hugoniot Elastic Limit (HEL) values of 0.13 ± 0.03 GPa determined by Asay [5], although slightly lower than values of ~0.2 GPa observed by Larson [6].…”

“…Marsh [4] presented Hugoniot data for particle velocities > 0.6 mm/ s (~16 GPa) only. A series of earlier studies did investigate the lower pressure regime [5,6]. However, this work by Asay [5] and Larson [6] was primarily focused on phase changes and melting in Bismuth under shock rather than specifically presenting equation of state data.…”

Femtosecond diffraction studies of solid and liquid phase changes in shock-compressed bismuth

“…Previous shock compression data (including the data of Romain et al . (grey open circles) 11 ) are shown by open symbols (triangles 15 , inverted triangles ( 36 , squares ( 8 , diamonds 9 , plus signs 37 , crosses 38 , and asterisks (reanalysed from 36 ). The room temperature EoSs obtained from static-compression studies (labelled in the inset) are shown with solid black lines, and their extrapolation to ambient pressure with dashed lines.…”

Complex structural dynamics of bismuth under laser-driven compression

“…Both the dynamic high-pressure and static high-pressure communities have devoted effort to this topic. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Significant progress has been made in the last decade in identifying the crystal structures of the high-pressure phases 17,18 and understanding the transformation kinetics. 13,14 The identified hostguest incommensurate structure of the Bi-III phase is quite unusual, constituting a significant challenge for theoreticians.…”