Published June 2017 | Version v1
Journal article Metadata-only

Exploring the effects of interlamellar binding modes on the hardness of ReB2 and MoB2 with laminar structure

Creators

  • 1. Jilin University, College of Physics, State Key Laboratory of Superhard Materials, Changchun (China)
  • 2. Jilin Inst. of Chemical Technology, School of Science, Changchun (China)
  • 3. Jilin Univ., Inst. of Atomic and Molecular Physics, Changchun (China)

Description

The properties of structure, elasticity, and electron for ReB2 and MoB2 are investigated, using first-principles calculations, as well as the role of chemical bonds between metal layer and boron layer in determining the hardness. The weakest shear crystalline plane of two diborides is determined by the bonding force of adhesive layers. The interlamellar bonding force in ReB2 is stronger than that in MoB2, resulting in a higher hardness for ReB2. The hardness of ReB2 (about 31 GPa) is still far below the threshold value for superhard materials because of the weak interlamellar covalent hybridization. (author)

Availability note (English)

Available from doi: https://doi.org/10.1139/cjp-2016-0799

Additional details

Identifiers

DOI
10.1139/cjp-2016-0799;

Publishing Information

Journal Title
Canadian Journal of Physics
Journal Volume
95
Journal Issue
6
Journal Page Range
p. 621-624
ISSN
0008-4204

INIS

Country of Publication
Canada
Country of Input or Organization
Canada
INIS RN
51105817
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ELASTICITY; ELECTRONIC STRUCTURE; MECHANICAL PROPERTIES; MOLYBDENUM BORIDES; RHENIUM BORIDES; VICKERS HARDNESS
Descriptors DEC
BORIDES; BORON COMPOUNDS; MECHANICAL PROPERTIES; MOLYBDENUM COMPOUNDS; REFRACTORY METAL COMPOUNDS; RHENIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
21 refs., 1 tab., 3 figs.