Theoretical and experimental studies of compression and shear deformation behavior of Osmium to 280 GPa
Theoretical and experimental studies of compression and shear deformation behavior of Osmium to 280 GPa
复制标题
280 GPa 锇压缩和剪切变形行为的理论和实验研究
DOI：
10.1088/2631-8695/ac34c4
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发表时间：
2021
影响因子：
1.7
通讯作者：
Vohra, Yogesh K
中科院分区：
文献类型：
--
作者：
Lin, Chia Min;Burrage, Kaleb C;Perreault, Chris;Chen, Wei-Chih;Chen, Cheng-Chien;Vohra, Yogesh K
利用金刚石对顶砧角色散轴向X射线衍射（A-XRD）研究了室温下金属锇在280 GPa（体积压缩V/Vo = 0.725）压力下的压缩行为。此外，在DAC中使用径向X射线衍射（R-XRD）技术测量了锇的剪切强度至170 GPa。DAC中的两种衍射技术均采用铂作为内压标准。密度泛函理论（DFT）计算也进行了，和计算的晶格参数和压缩下的体积与实验符合良好。DFT预测轴比（c/a）随压力单调增加，在150 GPa以下报告的（c/a）比小于1%的结构异常在理论计算和流体静力学测量中没有重现。锇的剪切强度的测量值（
The compression behavior of osmium metal was investigated up to 280 GPa (volume compression V/V o= 0.725) under nonhydrostatic conditions at ambient temperature using angle dispersive axial x-ray diffraction (A-XRD) with a diamond anvil cell (DAC). In addition, shear strength of osmium was measured to 170 GPa using radial x-ray diffraction (R-XRD) technique in DAC. Both diffraction techniques in DAC employed platinum as an internal pressure standard. Density functional theory (DFT) calculations were also performed, and the computed lattice parameters and volumes under compression are in good agreement with the experiments. DFT predicts a monotonous increase in axial ratio (c/a) with pressure and the structural anomalies of less than 1% in (c/a) ratio reported below 150 GPa were not reproduced in theoretical calculations and hydrostatic measurements. The measured value of shear strength of osmium (
影响因子：
64.8
作者：
Dubrovinsky, L.;Dubrovinskaia, N.;Abrikosov, I. A.
通讯作者：
Abrikosov, I. A.
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
B. Godwal;Jinyuan Yan;S. Clark;R. Jeanloz
通讯作者：
R. Jeanloz
影响因子：
3.7
作者：
Yokoo, Manabu;Kawai, Nobuaki;Tsuchiya, Taku
通讯作者：
Tsuchiya, Taku