scholarly journals Carbon-depleted outer core revealed by sound velocity measurements of liquid iron–carbon alloy

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Yoichi Nakajima ◽  
Saori Imada ◽  
Kei Hirose ◽  
Tetsuya Komabayashi ◽  
Haruka Ozawa ◽  
...  
Keyword(s):  
Sound Velocity ◽  
Liquid Iron ◽  
Outer Core ◽  
Velocity Measurements

The sound velocity measurements for liquid iron

2018 ◽  
Vol 1 (1) ◽  
pp. 36-39
Author(s):  
A.G. Kaptilniy ◽  
A.M. Kondratyev ◽  
A.E. Pletnev ◽  
A.D. Rakhel
Keyword(s):  
Sound Velocity ◽  
Liquid Iron ◽  
Velocity Measurements

Silicon‐Depleted Present‐Day Earth's Outer Core Revealed by Sound Velocity Measurements of Liquid Fe‐Si Alloy

2020 ◽  
Vol 125 (6) ◽  
Author(s):  
Yoichi Nakajima ◽  
Saori I. Kawaguchi ◽  
Kei Hirose ◽  
Shigehiko Tateno ◽  
Yasuhiro Kuwayama ◽  
...  
Keyword(s):  
Sound Velocity ◽  
Outer Core ◽  
Velocity Measurements

scholarly journals High Pressure and High Temperature Equation-of-State of Gamma and Liquid Iron

1997 ◽  
Vol 499 ◽  
Author(s):  
George Q. Chen ◽  
Thomas J. Ahrens
Keyword(s):  
Shock Wave ◽  
Equation Of State ◽  
Sound Velocity ◽  
Liquid Iron ◽  
Inner Core ◽  
Melting Curve ◽  
Outer Core ◽  
Pressure Derivative ◽  
Longitudinal Sound Velocity ◽  
Core Boundary

ABSTRACTShock-wave experiments on pure iron preheated to 1573 K were conducted in the 17–73 GPa range. The shock-wave equation of state of γ-iron at an initial temperature of 1573 K can be fit with us = 4.102 (0.015) km/s + 1.610(0.014) up with ρo = 7.413±0.012 Mg/m3 We obtain for γ-iron's bulk modulus and pressure derivative the values: 124.7±1.1 GPa and 5.44±0.06, respectively.We present new data for sound velocities in the γ- and liquid-phases. In the γ-phase, to a first approximation, the longitudinal sound velocity is linear with respect to density: Vp = −3.13 (0.72) + 1.119(0.084) p(units for Vp and p are km/s and Mg/m3, respectively). Melting was observed in the highest pressure (about 70–73 GPa) experiments at a calculated shock temperature of 2775±160 K. This result is consistent with a previously calculated melting curve (for ε-iron) which is close to those measured by Boehler [1] and Saxena et al. [2]. The liquid iron sound velocity data yields a Grüneisen parameter value of 1.63±0.28 at 9.37±0.02 Mg/m3 at 71.6 GPa. The quantity γρ is 15.2±2.6 Mg/m3, which agrees with the uncertainty bounds of Brown and McQueen [3] (13.3–19.6 Mg/m3). Based on upward pressure and temperature extrapolation of the melting curve of γ-iron, the estimated inner core-outer core boundary temperature is 5500±400 K, the temperature at the core-mantle boundary on the outer core side is 3930±630 K.

Sound velocity measurements in liquid iron by ultrasonic interferometry

1994 ◽  
Vol 99 (B3) ◽  
pp. 4285-4291 ◽  
Author(s):  
P. M. Nasch ◽  
M. H. Manghnani ◽  
R. A. Secco
Keyword(s):  
Sound Velocity ◽  
Liquid Iron ◽  
Velocity Measurements ◽  
Ultrasonic Interferometry

Sound velocity measurements in liquid argon, oxygen and nitrogen

Physica ◽  
1966 ◽  
Vol 32 (3) ◽  
pp. 611-620 ◽  
Author(s):  
W. Van Dael ◽  
A. Van Itterbeek ◽  
A. Cops ◽  
J. Thoen
Keyword(s):  
Sound Velocity ◽  
Liquid Argon ◽  
Velocity Measurements

Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering

2018 ◽  
Vol 103 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Takanori Sakairi ◽  
Tatsuya Sakamaki ◽  
Eiji Ohtani ◽  
Hiroshi Fukui ◽  
Seiji Kamada ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Sound Velocity ◽  
Velocity Measurements ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Sound Velocity Measurements in the Low and the High Field Phases of the Nuclear-Ordered bcc Solid 3He in Magnetic Fields

2008 ◽  
Vol 151 (5-6) ◽  
pp. 1113-1148
Author(s):  
Satoshi Sasaki ◽  
Atsuyoshi Nakayama ◽  
Yutaka Sasaki ◽  
Takao Mizusaki
Keyword(s):  
Magnetic Fields ◽  
Sound Velocity ◽  
High Field ◽  
Velocity Measurements ◽  
Solid 3He

A Field Meter for Sound Velocity Measurements

1953 ◽  
Vol 25 (4) ◽  
pp. 732-734 ◽  
Author(s):  
Robert C. McLoughlin ◽  
James R. Chiles
Keyword(s):  
Sound Velocity ◽  
Velocity Measurements
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