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Title: Structural analysis of liquid aluminum at high pressure and high temperature using the hard sphere model

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4963278· OSTI ID:1328801
 [1];  [1];  [1]
  1. 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
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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Cited By (2)

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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