Effects of deviatoric stresses in the diamond-anvil pressure cell on single-crystal samples

被引：26
|
作者：
Zhao, J. [1 ]
Angel, R. J. [1 ]
Ross, N. L. [1 ]
机构：
[1] Virginia Polytech Inst & State Univ, Crystallog Lab, Dept Geosci, Blacksburg, VA 24061 USA
来源：
JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2010年 / 43卷
基金：
美国国家科学基金会;
关键词：
X-RAY-DIFFRACTION; EQUATION-OF-STATE; R-LINE SHIFTS; NONHYDROSTATIC COMPRESSION; PHASE-TRANSITION; UNIAXIAL-STRESS; RUBY; ORIENTATION; CALIBRATION; ELASTICITY;
D O I：
10.1107/S0021889810016675
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The nonhydrostatic stress states that are developed in the pressure media within diamond-anvil pressure cells have been investigated by single-crystal X-ray diffraction. Measurements of unit-cell parameters of small single crystals under nonhydrostatic conditions are used to calculate the deviatoric strains and, through knowledge of the elastic tensors of the crystals, the stress state of the media. The results confirm that the stress state is effectively cylindrically symmetrical with the stress parallel to the load axis being greater than the radial stresses. The stress state in a given medium can be predicted and can be used to design a specific response of the lattice parameters of small single crystals to pressure beyond the hydrostatic pressure limit of the pressure medium.
引用
收藏
页码：743 / 751
页数：9
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