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
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
收藏
页码:155 / 162
页数:8
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