Osmium metal studied under high pressure and nonhydrostatic stress.
@article{Weinberger2008OsmiumMS, title={Osmium metal studied under high pressure and nonhydrostatic stress.}, author={Michelle B. Weinberger and Sarah H. Tolbert and Abby Kavner}, journal={Physical review letters}, year={2008}, volume={100 4}, pages={ 045506 } }
Interest in osmium as an ultra-incompressible material and as an analog for the behavior of iron at high pressure has inspired recent studies of its mechanical properties. We have measured elastic and plastic deformation of Os metal at high pressures using in situ high pressure x-ray diffraction in the radial geometry. We show that Os has the highest yield strength observed for any pure metal, supporting up to 10 GPa at a pressure of 26 GPa. Furthermore, our data indicate changes in the…
30 Citations
Incompressibility of osmium metal at ultrahigh pressures and temperatures
- Physics
- 2010
Osmium is one of the most incompressible elemental metals, and is used as a matrix material for synthesis of ultrahard materials. To examine the behavior of osmium metal under extreme conditions of…
High-pressure behavior of osmium: An analog for iron in Earth’s core
- Physics
- 2012
High-resolution x-ray diffraction with diamond-anvil cells, using argon as a quasi-hydrostatic pressure medium, documents the crystal structure and equation of state of osmium to over 60 GPa at room…
The most incompressible metal osmium at static pressures above 750 gigapascals
- PhysicsNature
- 2015
Powder X-ray diffraction measurements onallic osmium are reported at multi-megabar pressures using both conventional and double-stage diamond anvil cells, with accurate pressure determination ensured by first obtaining self-consistent equations of state of gold, platinum, and tungsten in static experiments up to 500 gigapascals.
Lattice strain of osmium diboride under high pressure and nonhydrostatic stress
- Materials Science
- 2012
The lattice strain behavior of osmium diboride—a member of a group of third-row transition metal borides associated with hard/superhard behavior—has been studied using radial diffraction in a diamond…
Estimating the Compressibility of Osmium from Recent Measurements of Ir-Os Alloys under High Pressure.
- PhysicsThe journal of physical chemistry. A
- 2016
It was concluded that the bulk modulus for osmium is slightly smaller than that for diamond, and a similar conclusion is obtained upon employing an alternative model, thus strengthening the conclusion that osmia is the densest but not the most incompressible element.
Elastic and thermal properties of osmium under pressure
- Materials Science
- 2011
In this study, first-principles calculations of the crystal structure and the elastic properties of osmium have been carried out using the plane-wave pseudopotential density functional theory method.…
Theoretical and experimental studies of compression and shear deformation behavior of Osmium to 280 GPa
- Materials ScienceEngineering Research Express
- 2021
The compression behavior of osmium metal was investigated up to 280 GPa (volume compression V/Vo = 0.725) under nonhydrostatic conditions at ambient temperature using angle dispersive axial x-ray…
High-pressure radial X-ray diffraction study of osmium to 58 GPa
- Materials Science
- 2010
AbstractNonhydrostatic compression behavior of osmium (Os) was investigated up to
58.2 GPa using radial X-ray diffraction (RXRD) together with lattice strain
theory in a diamond-anvil cell. The…
High-pressure structural study of solid mercury up to 200 GPa
- Materials Science, Chemistry
- 2014
High-pressure powder x-ray diffraction experiments have been carried out on solid mercury up to 196 GPa at room temperature. The hexagonal-close-packed δ phase, which exists above 36 GPa, is found to…
Advancements in the Search for Superhard Ultra‐Incompressible Metal Borides
- Materials Science
- 2009
Dense transition metal borides have recently been identified as superhard materials that offer the possibility of ambient pressure synthesis compared to the conventional high pressure, high…
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