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Title: Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures

Abstract

Combined ultrasonic and microtomographic measurements were conducted for simultaneous determination of elastic property and density of noncrystalline materials at high pressures. A Paris-Edinburgh anvil cell was placed in a rotation apparatus, which enabled us to take a series of x-ray radiography images under pressure over a 180 deg. angle range and construct accurately the three-dimensional sample volume using microtomography. In addition, ultrasonic elastic wave velocity measurements were carried out simultaneously using the pulse reflection method with a 10 deg. Y-cut LiNbO{sub 3} transducer attached to the end of the lower anvil. Combined ultrasonic and microtomographic measurements were carried out for SiO{sub 2} glass up to 2.6 GPa and room temperature. A decrease in elastic wave velocities of the SiO{sub 2} glass was observed with increasing pressure, in agreement with previous studies. The simultaneous measurements on elastic wave velocities and density allowed us to derive bulk (K{sub s}) and shear (G) moduli as a function of pressure. K{sub s} and G of the SiO{sub 2} glass also decreased with increasing pressure. The negative pressure dependence of K{sub s} is stronger than that of G, and as a result the value of K{sub s} became similar to G at 2.0-2.6 GPa. Theremore » is no reason why we cannot apply this new technique to high temperatures as well. Hence the results demonstrate that the combined ultrasonic and microtomography technique is a powerful tool to derive advanced (accurate) P-V-K{sub s}-G-(T) equations of state for noncrystalline materials.« less

Authors:
; ;  [1]; ;  [2]
  1. Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577 (Japan)
  2. GeoSoilEnviroCARS, Center for Advanced Radiation Sources, University of Chicago, 5640 S, Ellis Avenue, Chicago, Illinois 60637 (United States)
Publication Date:
OSTI Identifier:
22062255
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 82; Journal Issue: 2; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CRYSTALS; ELASTICITY; EQUATIONS OF STATE; GLASS; IMAGES; LITHIUM COMPOUNDS; NANOSTRUCTURES; NIOBATES; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; PRESSURE RANGE MEGA PA 10-100; REFLECTION; SHEAR; SILICON OXIDES; TEMPERATURE RANGE 0273-0400 K; TEMPERATURE RANGE 0400-1000 K; TOMOGRAPHY; TRANSDUCERS; ULTRASONIC TESTING; X-RAY RADIOGRAPHY

Citation Formats

Kono, Yoshio, Yamada, Akihiro, Inoue, Toru, Wang Yanbin, and Yu, Tony. Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures. United States: N. p., 2011. Web. doi:10.1063/1.3552185.
Kono, Yoshio, Yamada, Akihiro, Inoue, Toru, Wang Yanbin, & Yu, Tony. Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures. United States. doi:10.1063/1.3552185.
Kono, Yoshio, Yamada, Akihiro, Inoue, Toru, Wang Yanbin, and Yu, Tony. Tue . "Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures". United States. doi:10.1063/1.3552185.
@article{osti_22062255,
title = {Combined ultrasonic elastic wave velocity and microtomography measurements at high pressures},
author = {Kono, Yoshio and Yamada, Akihiro and Inoue, Toru and Wang Yanbin and Yu, Tony},
abstractNote = {Combined ultrasonic and microtomographic measurements were conducted for simultaneous determination of elastic property and density of noncrystalline materials at high pressures. A Paris-Edinburgh anvil cell was placed in a rotation apparatus, which enabled us to take a series of x-ray radiography images under pressure over a 180 deg. angle range and construct accurately the three-dimensional sample volume using microtomography. In addition, ultrasonic elastic wave velocity measurements were carried out simultaneously using the pulse reflection method with a 10 deg. Y-cut LiNbO{sub 3} transducer attached to the end of the lower anvil. Combined ultrasonic and microtomographic measurements were carried out for SiO{sub 2} glass up to 2.6 GPa and room temperature. A decrease in elastic wave velocities of the SiO{sub 2} glass was observed with increasing pressure, in agreement with previous studies. The simultaneous measurements on elastic wave velocities and density allowed us to derive bulk (K{sub s}) and shear (G) moduli as a function of pressure. K{sub s} and G of the SiO{sub 2} glass also decreased with increasing pressure. The negative pressure dependence of K{sub s} is stronger than that of G, and as a result the value of K{sub s} became similar to G at 2.0-2.6 GPa. There is no reason why we cannot apply this new technique to high temperatures as well. Hence the results demonstrate that the combined ultrasonic and microtomography technique is a powerful tool to derive advanced (accurate) P-V-K{sub s}-G-(T) equations of state for noncrystalline materials.},
doi = {10.1063/1.3552185},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 2,
volume = 82,
place = {United States},
year = {2011},
month = {2}
}