Equation of state of liquid Fe-17 wt % Si to 12 GPa

被引：18
作者：
Yu, Xueyang [1 ]
Secco, Richard A. [1 ]
机构：
[1] Univ Western Ontario, Dept Earth Sci, London, ON, Canada
来源：
HIGH PRESSURE RESEARCH | 2008年 / 28卷 / 01期
基金：
加拿大自然科学与工程研究理事会;
关键词：
equation of state; high P; T; liquid Fe-Si density; planetary core; bulk modulus; V-P;
D O I：
10.1080/08957950701882138
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Equation of state (EOS) of liquid Fe-l 7 wt%Si has been investigated at a temperature of 1773 K and pressures up to 12 GPa by the sink/float technique using composite spheres. The EOS of liquid Fe-l 7 wt%Si, in the form of the second order Birch-Murnaghan equation, produces K-0T = 68 +/- 2 GPa when K-0T' = 4.0. Considering the effect of temperature and pressure on KOT, extrapolation of this EOS to Earth's outer core conditions reveals that the addition of Si to liquid Fe decreases its density p and increases its compressional wave velocity V-P, indicating that Si is a possible light element candidate in the outer core. The possible existence of Si in the cores of other planetary bodies is also discussed.
引用
收藏
页码：19 / 28
页数：10
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