DOI: 10.1002/2013GL058859
论文题名: Sound velocity of iron up to 152 GPa by picosecond acoustics in diamond anvil cell
作者: Decremps F. ; Antonangeli D. ; Gauthier M. ; Ayrinhac S. ; Morand M. ; Marchand G. ; Bergame F. ; Philippe J.
刊名: Geophysical Research Letters
ISSN: 0094-10285
EISSN: 1944-10016
出版年: 2014
卷: 41, 期: 5 起始页码: 1459
结束页码: 1464
语种: 英语
英文关键词: elasticity
; iron
; picosecond acoustics
; PREM
; pressure
; sound velocity
Scopus关键词: Acoustic properties
; Acoustic wave velocity
; Acoustooptical effects
; Elasticity
; High temperature effects
; Iron
; Polycrystals
; Pressure
; Pumping (laser)
; Temperature
; Tools
; Picosecond acoustics
; Picosecond ultrasonics
; Preliminary reference earth models
; PREM
; Temperature correction
; Thermodynamic conditions
; Traditional techniques
; Velocity determination
; Acoustic measuring instruments
; accuracy assessment
; acoustic data
; diamond anvil cell
; high pressure
; high temperature
; iron
; laboratory method
; shock wave
; sound velocity
; thermodynamics
; ultrasonics
; X-ray diffraction
英文摘要: High-pressure method combining diamond anvil cell with picosecond ultrasonics technique is demonstrated to be a very suitable tool to measure the acoustic properties of iron up to 152 GPa. Such innovative approach allows to measure directly the longitudinal sound velocity under pressure of hundreds of GPa in laboratory, overcoming most of the drawbacks of traditional techniques. The very high accuracy, comparable to piezoacoustics technique, allows to observe the kink in elastic properties at the body-centered cubic-hexagonal close packed transition and to show with a good confidence that the Birch's law still stands up to 1.5 Mbar and ambient temperature. The linear extrapolation of the measured sound velocities versus densities of hcp iron is out of the preliminary reference Earth model, arguing for alloying effects or anharmonic high-temperature effects. A comparison between our measurements and shock wave experiments allowed us to quantify temperature corrections at constant pressure in ~-0.35 and ~-0.30 m s-1/K at 100 and 150 GPa, respectively. More in general, the here-presented technique allows detailed elastic and viscoelastic studies under extreme thermodynamic conditions on a wide variety of systems as liquids, crystalline, or polycrystalline solids, metallic or not, with very broad applications in Earth and planetary science. Key Points Ultrasonic sound velocity determination of iron at megabar pressure Novel technique combining pump-probe laser techniques and diamond anvil cell Critical assessments of indirect literature sound velocity data (XRD, IXS, and RIXS) ©2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894582850&doi=10.1002%2f2013GL058859&partnerID=40&md5=acf3926976542628e4b18bc1a3040e86
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7549
Appears in Collections: 气候减缓与适应
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作者单位: Institut de Minéralogie, de Physique des Matériaux, et de Cosmochimie, Sorbonne Universités - UPMC Univ Paris 06, Muséum National d'Histoire Naturelle, IRD, Paris, France
Recommended Citation:
Decremps F.,Antonangeli D.,Gauthier M.,et al. Sound velocity of iron up to 152 GPa by picosecond acoustics in diamond anvil cell[J]. Geophysical Research Letters,2014-01-01,41(5).