Shock temperatures and melting of iron at Earth core conditions.
Shock temperatures and melting of iron at Earth core conditions.
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DOI：
10.1103/physrevlett.70.3931
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发表时间：
1993-06
影响因子：
8.6
通讯作者：
C. Yoo;N. Holmes;M. Ross;D. Webb;C. R. Pike
中科院分区：
文献类型：
--
作者：
C. Yoo;N. Holmes;M. Ross;D. Webb;C. R. Pike
用溅射在透明金刚石衬底上的铁薄膜和1 ns时间分辨光学方法测量了冲击压缩铁的温度，其值为340 GPa。我们发现（P，T）铁Hugoniot的膝盖表明在6350 K和235 GPa和在6720 K和300 GPa熔化。在330 GPa（地球内外核边界的压力）下，外推得出铁的熔化温度为6830（\ifmmode\pm\else\textpm\fi{} 500）K。本文还讨论了熔化数据对铁相图的意义。
The temperature of shock compressed iron has been measured to 340 GPa, using well characterized iron films sputtered on transparent diamond substrates and a 1 ns time-resolved optical method. We find a knee on the (P,T) iron Hugoniot indicating melting at 6350 K and 235 GPa and at 6720 K and 300 GPa. An extrapolation yields an iron melting temperature of 6830 (\ifmmode\pm\else\textpm\fi{} 500) K at 330 GPa, the pressure of the Earth inner-outer core boundary. Implication of the melting data for the iron phase diagram is also discussed.