Structural analysis of liquid aluminum at high pressure and high temperature using the hard sphere model
- Carnegie Inst. of Washington, Argonne, IL (United States). High Pressure Collaborative Access Team (HPCAT), Geophysical Lab.
The structure of liquid aluminum is measured up to 6.9GPa and 1773K using a multi-angle energy-dispersive X-ray diffraction method in a Paris-Edinburgh press. The effect of pressure and temperature on the structure and density of liquid aluminum is analyzed by means of the hard sphere model. We report peak positions in the structure factor of liquid aluminum show a nearly constant value with varying temperatures at ~1–2 GPa and slightly change with varying pressures up to 6.9GPa at 1173–1773K. In contrast, the height of the first peak in the structure factor significantly changes with varying pressures and temperatures. Hard sphere model analysis shows that the structure of liquid aluminum in the pressure-temperature range of this study is controlled mostly by the packing fraction with only a minor change in hard sphere diameters. The obtained packing fractions and hard sphere diameters are used to calculate densities of liquid aluminum at high pressure-temperature conditions.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
- Grant/Contract Number:
- FG02-99ER45775; NA0001974; AC02-06CH11357; EAR-1128799; FG02-94ER14466
- OSTI ID:
- 1328801
- Journal Information:
- Journal of Applied Physics, Vol. 120, Issue 13; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
Web of Science
Pressure-induced structural change and nucleation in liquid aluminum
|
journal | December 2018 |
Pressure evolution of transverse collective excitations in liquid Al along the melting line
|
journal | July 2019 |
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