Shock compression of Fe‐FeS mixture up to 204 GPa
Shock compression of Fe‐FeS mixture up to 204 GPa
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DOI：
10.1002/grl.50180
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发表时间：
2013-02
影响因子：
5.2
通讯作者：
Haijun Huang;Shijie Wu;Xiaojun Hu;Qingsong Wang;Xiang Wang;Y. Fei
中科院分区：
文献类型：
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作者：
Haijun Huang;Shijie Wu;Xiaojun Hu;Qingsong Wang;Xiang Wang;Y. Fei
使用两级轻气炮，我们获得了铁硫合金（Fe-11.8wt%S）在94-204 GPa压力范围内的新冲击波Hugoniot数据。对Hugoniot数据进行最小二乘拟合，得到冲击波速度DS和粒子速度u之间的线性关系，DS（km/s）=3.60（0.14）+1.57（0.05）u。测量的Fe-11.8wt%S的Hugoniot数据与基于Fe和FeS的热力学参数使用加和定律的计算结果吻合得很好。通过将沿着绝热芯温度计算的密度与PREM密度分布进行比较，可以得到具有10重量%的铁芯。硫（S）是地球外核组成的最佳解决方案。
Using a two‐stage light gas gun, we obtained new shock wave Hugoniot data for an iron‐sulfur alloy (Fe‐11.8wt%S) over the pressure range of 94–204 GPa. A least‐squares fit to the Hugoniot data yields a linear relationship between shock velocity DS and particle velocity u, DS (km/s) =3.60(0.14) +1.57(0.05) u. The measured Hugoniot data for Fe‐11.8wt%S agree well with the calculated results based on the thermodynamic parameters of Fe and FeS using the additive law. By comparing the calculated densities along the adiabatic core temperature with the PREM density profile, an iron core with 10 wt.% sulfur (S) provides the best solution for the composition of the Earth's outer core.