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Hardness, elastic, and electronic properties of chromium monoboride

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4922147· OSTI ID:1332354
 [1];  [2];  [2];  [3];  [4];  [4];  [4];  [4];  [5];  [6];  [4];  [4];  [7];  [8];  [4]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Jilin Univ., Changchun (China); UNLV
  2. Univ. of Nevada, Las Vegas, NV (United States)
  3. China Institute of Atomic Energy, Beijing (China)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Jilin Univ., Changchun (China)
  6. Beihang Univ., Beijing (China)
  7. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. 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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Cited By (13)

Ultrastrong Boron Frameworks in ZrB 12 : A Highway for Electron Conducting journal November 2016
Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis journal January 2020
Transition‐Metal–Boron Intermetallics with Strong Interatomic d–sp Orbital Hybridization for High‐Performance Electrocatalysis journal January 2020
Transition Metal Diborides: A New Type of High‐performance Electrocatalysts for Nitrogen Reduction journal May 2019
Revealing the Unusual Rigid Boron Chain Substructure in Hard and Superconductive Tantalum Monoboride journal March 2019
Double-zigzag boron chain-enhanced Vickers hardness and manganese bilayers-induced high d-electron mobility in Mn 3 B 4 journal January 2019
Designing superhard metals: The case of low borides journal April 2018
Understanding the mechanism of hardness enhancement in tantalum-substituted tungsten monoboride solid solutions journal February 2019
Computational discovery of hard and superhard materials journal July 2019
Abnormal physical behaviors of hafnium diboride under high pressure journal December 2019
Thermophysical and mechanical properties of CrB and FeB journal March 2019
Structural stability of MoB up to 25 GPa: experiment and computation journal June 2019
The structural stabilities, mechanical properties and hardness of chromium tetraboride: Compared with low-B borides journal November 2016

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