Dynamic compression of copper to over 450 GPa: A high-pressure standard

被引：60

作者：

Kraus, R. G. ^{[1
]}

Davis, J. -P. ^{[2
]}

Seagle, C. T. ^{[2
]}

Fratanduono, D. E. ^{[1
]}

Swift, D. C. ^{[1
]}

Brown, J. L. ^{[2
]}

Eggert, J. H. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 13期

关键词：

ISENTROPIC COMPRESSION; RAMP COMPRESSION; ALUMINUM; RUBY; GAUGE; STATE; AG; CU; CALIBRATION; EQUATIONS;

D O I：

10.1103/PhysRevB.93.134105

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An absolute stress-density path for shocklessly compressed copper is obtained to over 450 GPa. A magnetic pressure drive is temporally tailored to generate shockless compression waves through over 2.5-mm-thick copper samples. The free-surface velocity data is analyzed for Lagrangian sound velocity using the iterative Lagrangian analysis (ILA) technique, which relies upon the method of characteristics. We correct for the effects of strength and plastic work heating to determine an isentropic compression path. By assuming a Debye model for the heat capacity, we can further correct the isentrope to an isotherm. Our determination of the isentrope and isotherm of copper represents a highly accurate pressure standard for copper to over 450 GPa.

引用

页数：11

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