By Topic

Pressure calibration to 20 GPa by simultaneous use of ultrasonic and x-ray techniques

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

4 Author(s)
Li, Baosheng ; Mineral Physics Institute, Stony Brook University, Stony Brook, New York 11794-2100 ; Kung, Jennifer ; Uchida, Takeyuki ; Wang, Yanbin

Your organization might have access to this article on the publisher's site. To check, click on this link: 

Simultaneous measurements of elastic P- and S-wave travel times, density (specific volume), and sample length using a multianvil apparatus interfaced with ultrasonic interferometry and x-ray diffraction and radiography have enabled simultaneous determination of elastic properties and absolute pressure at high pressures and high temperatures. Experimental procedures and data analyses are demonstrated using data collected on polycrystalline samples of ferropericalse (MgFe) and wadsleyite Mg2SiO4 under quasihydrostatic conditions up to 20 GPa. Compared with those derived from the internal pressure standard in the same experiments based on equations of state of NaCl, the directly determined pressure at 20 GPa is ∼8% and ∼12% higher than those inferred from the Brown and Decker pressure scales, respectively. The discrepancy cannot be reconciled by uncertainties in the NaCl pressure scale and current experimental data. Until further results are available, the pressure determined in this study is believed to be a more accurate measurement of the effective pressure imposed on the sample than that inferred from NaCl based on previous pressure scales.

Published in:

Journal of Applied Physics  (Volume:98 ,  Issue: 1 )