期刊
APPLIED PHYSICS LETTERS
卷 106, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4922147
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资金
- CNSF [51402350, 51471018]
We report high-pressure synthesis of chromium monoboride (CrB) at 6GPa and 1400 K. The elastic and plastic behaviors have been investigated by hydrostatic compression experiment and micro-indentation measurement. CrB is elastically incompressible with a high bulk modulus of 269.0 (5.9) GPa and exhibits a high Vickers hardness of 19.6 (0.7) GPa under the load of 1 kg force. Based on first principles calculations, the observed mechanical properties are attributed to the polar covalent Cr-B bonds interconnected with strong zigzag B-B covalent bonding network. The presence of metallic Cr bilayers is presumably responsible for the weakest paths in shear deformation. (C) 2015 AIP Publishing LLC.
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