Static strength and equation of state of rhenium at ultra-high pressures

Jeanloz, Raymond; Godwal, B. K.; Meade, Charles

doi:10.1038/349687a0

Cited by 78 publications

(68 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The measured lattice deformations and the elastic stiffness are then used to calculate the sample stress state, though some assumptions are required to obtain the full elastic stiffness tensor. The two techniques showed good agreement for rhenium [33,35]. These techniques give a lower bound on strength rather than its actual value since the material may support shear stresses but not be currently yielding.…”

Section: Strength Measurements In Diamond Anvil Cellsmentioning

confidence: 81%

See 1 more Smart Citation

Strength behavior of materials at high pressures

Vogler

Chhabildas

2006

International Journal of Impact Engineering

View full text Add to dashboard Cite

Section: Strength Measurements In Diamond Anvil Cellsmentioning

confidence: 81%

“…One approach is to measure pressure as a function of radial position in the DAC sample (e.g. [22,33]). The shear stress is then related to the radial variation of pressure by…”

Section: Strength Measurements In Diamond Anvil Cellsmentioning

confidence: 99%

Strength behavior of materials at high pressures

Vogler

Chhabildas

2006

International Journal of Impact Engineering

View full text Add to dashboard Cite

“…The elasticity of hcp iron is important for understanding the elastic anisotropy of the inner core [3][4][5] , and its super-rotation 6 . Rhenium is the strongest metal known at high pressure 7 and is widely used as a gasket material in diamond anvil cell experiments. We have chosen cobalt for this study because of its proximity to iron in the periodic table and as an example of a ferromagnetic hcp metal.…”

Section: Introductionmentioning

confidence: 99%

First-principles elastic constants for the hcp transition metals Fe, Co, and Re at high pressure

1999

View full text Add to dashboard Cite

The elastic constant tensors for the hcp phases of three transition metals (Co, Re, and Fe) are computed as functions of pressure using the Linearized Augmented Plane Wave method with both the local density and generalized gradient approximations. Spin-polarized states are found to be stable for Co (ferromagnetic) and Fe (antiferromagnetic at low pressure). The elastic constants of Co and Re are compared to experimental measurements near ambient conditions and excellent agreement is found. Recent measurements of the lattice strain in high pressure experiments when interpreted in terms of elastic constants for Re and Fe are inconsistent with the calculated moduli.

show abstract

“…In Figure 9 we compare room-T isotherm data to our T = 0 isotherm as determined from QMD; the experimental data are from [3,4,[39][40][41]. It is seen that all of the available data and the QMD points are in excellent agreement up to ρ∼26 g/cc (P∼150 GPa) beyond which the different sources of data begin to depart from one another.…”

Section: T = 0 Isothermmentioning

confidence: 58%

Systematics of the Third Row Transition Metal Melting: The HCP Metals Rhenium and Osmium

Burakovsky

Preston

et al. 2018

Crystals

View full text Add to dashboard Cite

Abstract:The melting curves of rhenium and osmium to megabar pressures are obtained from an extensive suite of ab initio quantum molecular dynamics (QMD) simulations using the Z method. In addition, for Re, we combine QMD simulations with total free energy calculations to obtain its phase diagram. Our results indicate that Re, which generally assumes a hexagonal close-packed (hcp) structure, melts from a face-centered cubic (fcc) structure in the pressure range 20-240 GPa. We conclude that the recent DAC data on Re to 50 GPa in fact encompass both the true melting curve and the low-slope hcp-fcc phase boundary above a triple point at (20 GPa, 4240 K). A linear fit to the Re diamond anvil cell (DAC) data then results in a slope that is 2.3 times smaller than that of the actual melting curve. The phase diagram of Re is topologically equivalent to that of Pt calculated by us earlier on. Regularities in the melting curves of Re, Os, and five other 3rd-row transition metals (Ta, W, Ir, Pt, Au) form the 3rd-row transition metal melting systematics. We demonstrate how this systematics can be used to estimate the currently unknown melting curve of the eighth 3rd-row transition metal Hf.

show abstract

Static strength and equation of state of rhenium at ultra-high pressures

Cited by 78 publications

References 19 publications

Strength behavior of materials at high pressures

Strength behavior of materials at high pressures

First-principles elastic constants for the hcp transition metals Fe, Co, and Re at high pressure

Systematics of the Third Row Transition Metal Melting: The HCP Metals Rhenium and Osmium

Contact Info

Product

Resources

About