Compression behaviour of elastically anisotropic polycrystals using energy-dispersive X-ray diffraction

被引：11

作者：

Otto, JW ^{[1
]}

Vassiliou, JK ^{[1
]}

Frommeyer, G ^{[1
]}

机构：

[1] VILLANOVA UNIV,DEPT PHYS,VILLANOVA,PA 19085

来源：

JOURNAL OF SYNCHROTRON RADIATION | 1997年 / 4卷

关键词：

high pressure; Cu3Au; equation of state; plastic deformation; polycrystals;

D O I：

10.1107/S0909049597003294

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The compression behaviour of a foil of Cu3Au in a pressure medium of NaCl has been studied by energy-dispersive X-ray diffraction in a diamond-anvil cell. Evidence from stress analysis and peak broadening of the foil (the most extreme example of a non-ideal powder) throws light on the compression of powders under non-hydrostatic conditions. A complete pressure cycle, including re-pressurization after pressure release, shows that significant plastic deformation takes place which results in large deviations from a (hydrostatic) equation of state. The origin of the deformations is traced to shear stresses transmitted to the sample through the pressure medium.

引用

页码：155 / 162

页数：8

共 26 条

[1] The effect of pressure upon the elastic parameters of isotropic solids, according to Murnaghan's theory of finite strain [J].