Quantitative measurements of density in shock-compressed silver up to 330 GPa using x-ray diffraction

被引:7
|
作者
Coleman, Amy L. [1 ]
Singh, Saransh [1 ]
Vennari, Cara E. [1 ]
Smith, Raymond F. [1 ]
Volz, Travis J. [1 ]
Gorman, Martin G. [1 ]
Clarke, Samantha M. [1 ]
Eggert, Jon H. [1 ]
Coppari, Federica [1 ]
Fratanduono, Dayne E. [1 ]
Briggs, Richard [1 ]
机构
[1] Lawrence Livermore Natl Lab, Livermore, CA 94500 USA
关键词
METALS; LIQUID; STACKING; TEXTURE;
D O I
10.1063/5.0072208
中图分类号
O59 [应用物理学];
学科分类号
摘要
This work presents a structural study of shock-compressed states in Ag to 331 GPa, accessed via laser shock compression. Structures of the resulting crystalline phases and the average atomic distribution of the liquid state are determined using in situ x-ray diffraction. We employ structure factor analysis, adapted for a non-monochromatic x-ray source, to determine the density of the liquid phase from analysis of x-ray diffraction data for the first time in shock compressed Ag. We also present a detailed analysis of the crystalline phases, which shows good agreement with the phase boundaries reported in previous experimental and theoretical works. We utilize the whole powder pattern fitting approach implemented in the MAUD package to constrain stacking faults in the face centered cubic structure. We observe the ambient fcc structure up to a stress of 146 GPa before a transition to a body-centered cubic structure and liquid phase at 179 GPa, with full melting above 212 GPa.
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收藏
页数:10
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