Exploring the hardness and high-pressure behavior of osmium and ruthenium-doped rhenium diboride solid solutions
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-03-01 |
| Journal | APL Materials |
| Authors | Shanlin Hu, Lisa E. Pangilinan, Christopher L. Turner, Reza Mohammadi, A. Kavner |
| Institutions | Virginia Commonwealth University, University of California, Los Angeles |
| Citations | 2 |
Abstract
Section titled āAbstractāRhenium diboride (ReB2) exhibits high differential strain due to its puckered boron sheets that impede shear deformation. Here, we demonstrate the use of solid solution formation to enhance the Vickers hardness and differential strain of ReB2. ReB2-structured solid solutions (Re0.98Os0.02B2 and Re0.98Ru0.02B2, noted as āReOsB2ā and āReRuB2ā) were synthesized via arc-melting from the pure elements. In-situ high-pressure radial x-ray diffraction was performed in the diamond anvil cell to study the incompressibility and lattice strain of ReOsB2 and ReRuB2 up to ā¼56 GPa. Both solid solutions exhibit higher incompressibility and differential strain than pure ReB2. However, while all lattice planes are strengthened by doping osmium (Os) into the ReB2 structure, only the weakest ReB2 lattice plane is enhanced with ruthenium (Ru). These results are in agreement with the Vickers hardness measurements of the two systems, where higher hardness was observed in ReOsB2. The combination of high-pressure studies with experimentally observed hardness data provides lattice specific information about the strengthening mechanisms behind the intrinsic hardness enhancement of the ReB2 system.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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