Abstract
The physical properties of liquid Fe alloys are important for understanding the characteristics of the molten outer core. The possible core composition can be constrained by matching the observed seismic data with the measured sound velocity and density of liquid Fe alloys. The transport properties of liquid Fe alloys strongly influence the convection behavior of the outer core. This chapter reviews the latest results on the elastic and transport properties of liquid Fe alloys obtained based on experimental and numerical approaches. Three variables of pressure (P), temperature (T), and specific volume (V), which are indispensable for understanding the structure and properties of Earth's interior, are linked by an equation of state (EOS). Convectional motion of the outer core is controlled by core magneto hydrodynamics. The viscosity of liquid Fe, Fe-S, and Fe-C at high pressures has been measured using the falling sphere method combined with in situ X-ray radiography.
| Original language | English |
|---|---|
| Title of host publication | Deep Earth |
| Subtitle of host publication | Physics and Chemistry of the Lower Mantle and Core |
| Publisher | wiley |
| Pages | 129-142 |
| Number of pages | 14 |
| ISBN (Electronic) | 9781118992487 |
| ISBN (Print) | 9781118992470 |
| DOIs | |
| Publication status | Published - Jan 1 2015 |
| Externally published | Yes |
Keywords
- Convectional motion
- Elastic properties
- Equation of state
- In situ X-ray radiography
- Liquid Fe alloys
- Magnetohydrodynamics
- Molten outer core
- Transport properties
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)