scholarly journals High-Pressure Deformation of Iron–Nickel–Silicon Alloys and Implications for Earth’s Inner Core

2020 ◽  
Author(s):  
Matthew Brennan ◽  
Rebecca Fischer ◽  
Samantha Couper ◽  
Lowell Miyagi ◽  
Daniele Antonangeli ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Silicon Alloys ◽  
Iron Nickel ◽  
Earth’S Inner Core ◽  
Nickel Silicon

scholarly journals High‐Pressure Deformation of Iron–Nickel–Silicon Alloys and Implications for Earth’s Inner Core

2021 ◽  
Vol 126 (3) ◽  
Author(s):  
Matthew C. Brennan ◽  
Rebecca A. Fischer ◽  
Samantha Couper ◽  
Lowell Miyagi ◽  
Daniele Antonangeli ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Silicon Alloys ◽  
Iron Nickel ◽  
Earth’S Inner Core ◽  
Nickel Silicon

scholarly journals Two-phase mixture of iron–nickel–silicon alloys in the Earth’s inner core

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Daijo Ikuta ◽  
Eiji Ohtani ◽  
Naohisa Hirao
Keyword(s):  
Inner Core ◽  
Earth Model ◽  
Two Phase ◽  
Silicon Alloys ◽  
Hexagonal Close Packed ◽  
Iron Nickel ◽  
Earth’S Inner Core ◽  
Phase Mixture ◽  
Core Conditions ◽  
Nickel Silicon

AbstractThe Earth’s inner core comprises iron-nickel alloys with light elements. However, there is no clarity on the phase properties of these alloys. Here we show phase relations and equations of state of iron–nickel and iron–nickel–silicon alloys up to 186 gigapascals and 3090 kelvin. An ordered derivative of the body-centred cubic structure (B2) phase was observed in these alloys. Results show that nickel and silicon influence the stability field associated with the two-phase mixture of B2 and hexagonal close-packed phases under core conditions. The two-phase mixture can give the inner core density of the preliminary reference Earth model. The compressional wave velocity of the two-phase mixture under inner core conditions is consistent with that of the preliminary reference Earth model. Therefore, a mixture of B2 and hexagonal close-packed phases may exist in the inner core and accounts for the seismological properties of the inner core such as density and velocity deficits.

Anab initiostudy of S-substituted iron–nickel–silicon alloy at the Earth's inner core pressure

2008 ◽  
Vol 28 (4) ◽  
pp. 437-441 ◽  
Author(s):  
M. Mattesini ◽  
E. Buforn ◽  
A. Udías ◽  
L. Vitos ◽  
R. Ahuja
Keyword(s):  
Inner Core ◽  
Silicon Alloy ◽  
Iron Nickel ◽  
Earth’S Inner Core ◽  
Nickel Silicon

scholarly journals Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys

2010 ◽  
Vol 295 (1-2) ◽  
pp. 292-296 ◽  
Author(s):  
Daniele Antonangeli ◽  
Julien Siebert ◽  
James Badro ◽  
Daniel L. Farber ◽  
Guillaume Fiquet ◽  
...  
Keyword(s):  
High Pressure ◽  
Sound Velocity ◽  
Inner Core ◽  
Velocity Measurements ◽  
Earth’S Inner Core

scholarly journals Sound velocity in iron carbide (Fe3C) at high pressure: Implications for the carbon content of the Earth's inner core

2009 ◽  
Vol 172 (1-2) ◽  
pp. 125-129 ◽  
Author(s):  
Guillaume Fiquet ◽  
James Badro ◽  
Eugene Gregoryanz ◽  
Yingwei Fei ◽  
Florent Occelli
Keyword(s):  
High Pressure ◽  
Carbon Content ◽  
Sound Velocity ◽  
Inner Core ◽  
Iron Carbide ◽  
Earth’S Inner Core

scholarly journals Sound velocities and density measurements of solid hcp-Fe and hcp-Fe–Si (9 wt.%) alloy at high pressure: Constraints on the Si abundance in the Earth's inner core

2018 ◽  
Vol 482 ◽  
pp. 446-453 ◽  
Author(s):  
Daniele Antonangeli ◽  
Guillaume Morard ◽  
Luigi Paolasini ◽  
Gaston Garbarino ◽  
Caitlin A. Murphy ◽  
...  
Keyword(s):  
High Pressure ◽  
Inner Core ◽  
Density Measurements ◽  
Earth’S Inner Core ◽  
Sound Velocities
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