Back to Search
Start Over
Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa.
- Source :
-
Physical review letters [Phys Rev Lett] 2017 Jan 13; Vol. 118 (2), pp. 025501. Date of Electronic Publication: 2017 Jan 09. - Publication Year :
- 2017
-
Abstract
- Using x-ray diffraction at the Linac Coherent Light Source x-ray free-electron laser, we have determined simultaneously and self-consistently the phase transitions and equation of state (EOS) of the lightest transition metal, scandium, under shock compression. On compression scandium undergoes a structural phase transition between 32 and 35 GPa to the same bcc structure seen at high temperatures at ambient pressures, and then a further transition at 46 GPa to the incommensurate host-guest polymorph found above 21 GPa in static compression at room temperature. Shock melting of the host-guest phase is observed between 53 and 72 GPa with the disappearance of Bragg scattering and the growth of a broad asymmetric diffraction peak from the high-density liquid.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 118
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 28128621
- Full Text :
- https://doi.org/10.1103/PhysRevLett.118.025501