Hardness, elastic, and electronic properties of chromium monoboride
- Chinese Academy of Sciences (CAS), Beijing (China); Jilin Univ., Changchun (China); UNLV
- Univ. of Nevada, Las Vegas, NV (United States)
- China Institute of Atomic Energy, Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Jilin Univ., Changchun (China)
- Beihang Univ., Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Nevada, Las Vegas, NV (United States)
Here, we report high-pressure synthesis of chromium monoboride (CrB) at 6 GPa 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.
- Research Organization:
- Univ. of Nevada, Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0001982
- OSTI ID:
- 1332354
- Alternate ID(s):
- OSTI ID: 22415100
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 106; ISSN APPLAB; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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