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Title: Shear strength measurements and hydrostatic compression of rhenium diboride under high pressures

Abstract

Shear strength measurements have been carried out on rhenium diboride, ReB2, to a pressure of 74 GPa using a Radial X-ray Diffraction (R-XRD) technique in a diamond anvil cell using platinum as an internal x-ray pressure standard. The R-XRD result has provided a unique insight into the deformation of hexagonal crystal lattice under non-hydrostatic compression and variation of shear strength with increasing pressure. From R-XRD data, we have estimated hydrostatic component of compression to determine an equation of state of rhenium diboride yielding a bulk modulus of K0 = 366 ± 25 GPa with a pressure derivative $$K^{'}_{0}$$ = 4.3 ± 0.5 in good agreement with hydrostatic density functional theory calculations. Here, the average lower bound of shear strength (τ) from various diffraction planes was then calculated using the measured interplanar d-spacing (dm) and hydrostatic component of d-spacing (dp) to be shown to approach 6.7 ± 0.4 GPa at 70 GPa. Our results show that the anisotropic compression effects observed in ReB2 under hydrostatic compression are correlated to electronic structure changes under compression as predicted by theoretical calculations.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Univ. of Alabama, Birmingham, AL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF)
OSTI Identifier:
1813044
Alternate Identifier(s):
OSTI ID: 1784431
Grant/Contract Number:  
AC02-06CH11357; DMR-1904164
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 129; Journal Issue: 20; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Diamond anvil cells; Hydrostatics; Shear modulus; Transition metals; Bulk modulus; X-ray diffraction; Density functional theory; Equations of state; Crystal lattices

Citation Formats

Burrage, Kaleb C., Park, Changyong, and Vohra, Yogesh K. Shear strength measurements and hydrostatic compression of rhenium diboride under high pressures. United States: N. p., 2021. Web. doi:10.1063/5.0050057.
Burrage, Kaleb C., Park, Changyong, & Vohra, Yogesh K. Shear strength measurements and hydrostatic compression of rhenium diboride under high pressures. United States. https://doi.org/10.1063/5.0050057
Burrage, Kaleb C., Park, Changyong, and Vohra, Yogesh K. Mon . "Shear strength measurements and hydrostatic compression of rhenium diboride under high pressures". United States. https://doi.org/10.1063/5.0050057. https://www.osti.gov/servlets/purl/1813044.
@article{osti_1813044,
title = {Shear strength measurements and hydrostatic compression of rhenium diboride under high pressures},
author = {Burrage, Kaleb C. and Park, Changyong and Vohra, Yogesh K.},
abstractNote = {Shear strength measurements have been carried out on rhenium diboride, ReB2, to a pressure of 74 GPa using a Radial X-ray Diffraction (R-XRD) technique in a diamond anvil cell using platinum as an internal x-ray pressure standard. The R-XRD result has provided a unique insight into the deformation of hexagonal crystal lattice under non-hydrostatic compression and variation of shear strength with increasing pressure. From R-XRD data, we have estimated hydrostatic component of compression to determine an equation of state of rhenium diboride yielding a bulk modulus of K0 = 366 ± 25 GPa with a pressure derivative $K^{'}_{0}$ = 4.3 ± 0.5 in good agreement with hydrostatic density functional theory calculations. Here, the average lower bound of shear strength (τ) from various diffraction planes was then calculated using the measured interplanar d-spacing (dm) and hydrostatic component of d-spacing (dp) to be shown to approach 6.7 ± 0.4 GPa at 70 GPa. Our results show that the anisotropic compression effects observed in ReB2 under hydrostatic compression are correlated to electronic structure changes under compression as predicted by theoretical calculations.},
doi = {10.1063/5.0050057},
journal = {Journal of Applied Physics},
number = 20,
volume = 129,
place = {United States},
year = {Mon May 24 00:00:00 EDT 2021},
month = {Mon May 24 00:00:00 EDT 2021}
}

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