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Title: Iron sound velocities in shock wave experiments

Abstract

We have performed a series of sound velocity measurements in iron at earth's core pressures. Experiments were carried out at shock pressures as high as 400 GPa, with particular emphasis on the pressure range between 175 GPa and 275 GPa. The measured sound velocities of iron at elevated pressures exhibit a single discontinuity near 250 GPa, corresponding to the vanishing of shear strength as the iron melts. A second discontinuity reported by Brown and McQueen in their previous iron sound velocity studies was not observed in our study. Our results are consistent with their data otherwise. Experimental details and error propagation techniques essential to determining the melting point will also be discussed.

Authors:
;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
12444
Report Number(s):
UCRL-JC-133194; DP0102012
DP0102012; TRN: AH200120%%253
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: American Physical Society Shock Wave Conference, Snowbird, UT (US), 06/28/1999--07/02/1999; Other Information: PBD: 20 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 36 MATERIALS SCIENCE; IRON; MELTING POINTS; SHEAR PROPERTIES; SHOCK WAVES; SOUND WAVES; WAVE PROPAGATION; EARTH CORE; VERY HIGH PRESSURE

Citation Formats

Holmes, N C, and Nguyen, J H. Iron sound velocities in shock wave experiments. United States: N. p., 1999. Web.
Holmes, N C, & Nguyen, J H. Iron sound velocities in shock wave experiments. United States.
Holmes, N C, and Nguyen, J H. Fri . "Iron sound velocities in shock wave experiments". United States. https://www.osti.gov/servlets/purl/12444.
@article{osti_12444,
title = {Iron sound velocities in shock wave experiments},
author = {Holmes, N C and Nguyen, J H},
abstractNote = {We have performed a series of sound velocity measurements in iron at earth's core pressures. Experiments were carried out at shock pressures as high as 400 GPa, with particular emphasis on the pressure range between 175 GPa and 275 GPa. The measured sound velocities of iron at elevated pressures exhibit a single discontinuity near 250 GPa, corresponding to the vanishing of shear strength as the iron melts. A second discontinuity reported by Brown and McQueen in their previous iron sound velocity studies was not observed in our study. Our results are consistent with their data otherwise. Experimental details and error propagation techniques essential to determining the melting point will also be discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}

Conference:
Other availability
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