Vanadium Diboride (vb2) Synthesized At High Pressure: Elastic, Mechanical, Electronic, And Magnetic Properties And Thermal Stability

Authors

P Wang, University of Nevada, Las VegasFollow
R Kumar, University of Nevada, Las VegasFollow
E M. Sankaran, University of Nevada, Las Vegas
X Qi, Stony Brook University
X Zhang, Yanshan UniversityFollow
D Popov, Carnegie Institution of Washington
A L. Cornelius, University of Nevada, Las VegasFollow
B Li, Stony Brook University
Y Zhao, University of Nevada, Las VegasFollow
L Wang, University of Nevada, Las VegasFollow

Document Type

Article

Publication Date

1-1-2018

Publication Title

Inorganic Chemistry

Publisher

American Chemical Society

Volume

57

Issue

3

First page number:

1096

Last page number:

1105

Abstract

Vanadium diboride (VB2) with an AlB2-type structure has been synthesized at 8 GPa and 1700 K in a D-DIA-type multianvil apparatus. The obtained bulk modulus is B0 = 262(2) GPa with fixed B′ = 4.0 for VB2 via high-pressure X-ray diffraction measurements. Meanwhile, VB2 has also been demonstrated to possess a high Vickers hardness of 27.2 ± 1.5 GPa, a high thermal stability of 1410 K in air, among the highest for transition-metal borides, and an extremely low resistivity value (41 μω cm) at room temperature. Results from first-principles calculations regarding the mechanical and electronic properties of VB2 are largely consistent with the experimental observations and further suggest that VB2 possesses simultaneously the properties of a hard and refractory ceramic and those of an excellent electric conductor. © 2018 American Chemical Society.

Language

English

Repository Citation

Wang, P., Kumar, R., Sankaran, E. M., Qi, X., Zhang, X., Popov, D., Cornelius, A. L., Li, B., Zhao, Y., Wang, L. (2018). Vanadium Diboride (vb2) Synthesized At High Pressure: Elastic, Mechanical, Electronic, And Magnetic Properties And Thermal Stability. Inorganic Chemistry, 57(3), 1096-1105. American Chemical Society.
http://dx.doi.org/10.1021/acs.inorgchem.7b02550