Compression of porous aluminum: combined ultrasonic and microtomography measurements with lattice-Boltzmann permeability simulations. Issue 3 (3rd July 2019)

• Record Type: Journal Article
• Authors: Anzures, Brendan A.; Watson, Heather C.; Kono, Yoshio; Yu, Tony; Wang, Yanbin
• Is Part Of: High pressure research. Volume 39:Issue 3(2019)
• Page Start: 438
• Page End: 456
• Publication Date: 2019-07-03
• Subjects: Tomography -- permeability -- acoustic measurements -- composite materials -- geophysics; High pressure (Science) -- Periodicals; High pressure (Technology) -- Periodicals; 536.41
• DOI: 10.1080/08957959.2019.1632840
• Languages: English
• ISSNs: 0895-7959

Abstract

ABSTRACT: Combined ultrasonic and X-ray microtomography measurements in situ at high pressure, in conjunction with lattice-Boltzmann simulations, enabled simultaneous investigation several physical parameters including: elastic wave velocities ( v p and v s ); apparent Poisson's ratio; pore structure; porosity; and permeability. Experiments were conducted on a simple analog material, porous mold-quality aluminum, in a Paris-Edinburgh cell from 0.14 to 1.36 GPa. Porosity was observed to have a strong inverse dependence on pressure up to ∼0.9 GPa, while permeability has an anisotropic dependence on pressure. Elastic wave velocity ( v p, v s ) and apparent Poisson's ratio all increase with pressure, with v p agreeing well with the Hashin–Shtrikman upper bound at lower pressures and higher porosities. These results demonstrate a new methodology combining experimental and analytical methods to provide cross-property links between microscopic structure and macroscopic elastic properties. Future investigations on more complex Earth materials may have important implications for our understanding of the composition of the deep Earth.