Projects per year
Abstract / Description of output
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.
Original language | English |
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Article number | 025501 |
Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Physical Review Letters |
Volume | 118 |
Issue number | 2 |
Early online date | 9 Jan 2017 |
DOIs | |
Publication status | Published - 13 Jan 2017 |
Keywords / Materials (for Non-textual outputs)
- HIGH-PRESSURE
- METALS
- MATTER
- IRON
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Dive into the research topics of 'Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa'. Together they form a unique fingerprint.Projects
- 2 Finished
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Renewal of William Penney Fellow
UK industry, commerce and public corporations
1/12/15 → 30/11/21
Project: Research
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The Creation and Diagnosis of Soild-State Matter at Multi-TeraPascal Pressures
30/09/12 → 31/03/17
Project: Research
Profiles
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Stewart Mcwilliams
- School of Physics and Astronomy - Personal Chair of Mineral Physics
Person: Academic: Research Active