Hardness, elastic, and electronic properties of chromium monoboride

Lei Han; Shanmin Wang; Jinlong Zhu; Songbai Han; Wenmin Li; Bijuan Chen; Xiancheng Wang; Xiaohui Yu; Baochang Liu; Ruifeng Zhang; Youwen Long; Jinguang Cheng; Jianzhong Zhang; Yusheng Zhao; Changqing Jin

doi:10.1063/1.4922147

Hardness, elastic, and electronic properties of chromium monoboride

Lei Han
, Shanmin Wang
, Jinlong Zhu
, Songbai Han
, Wenmin Li
, Bijuan Chen
, Xiancheng Wang
, Xiaohui Yu^*
, Baochang Liu
, Ruifeng Zhang
, Youwen Long
, Jinguang Cheng
, Jianzhong Zhang
, Yusheng Zhao
, Changqing Jin

^*Corresponding author for this work

School of Materials Science and Engineering

CAS - Institute of Physics
College of Construction Engineering
University of Nevada, Las Vegas
China National Nuclear Corporation
United States Department of Energy

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

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.

Original language	English
Article number	221902
Journal	Applied Physics Letters
Volume	106
Issue number	22
DOIs	https://doi.org/10.1063/1.4922147
State	Published - 1 Jun 2015

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title = "Hardness, elastic, and electronic properties of chromium monoboride",

abstract = "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.",

author = "Lei Han and Shanmin Wang and Jinlong Zhu and Songbai Han and Wenmin Li and Bijuan Chen and Xiancheng Wang and Xiaohui Yu and Baochang Liu and Ruifeng Zhang and Youwen Long and Jinguang Cheng and Jianzhong Zhang and Yusheng Zhao and Changqing Jin",

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doi = "10.1063/1.4922147",

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TY - JOUR

T1 - Hardness, elastic, and electronic properties of chromium monoboride

AU - Han, Lei

AU - Wang, Shanmin

AU - Zhu, Jinlong

AU - Han, Songbai

AU - Li, Wenmin

AU - Chen, Bijuan

AU - Wang, Xiancheng

AU - Yu, Xiaohui

AU - Liu, Baochang

AU - Zhang, Ruifeng

AU - Long, Youwen

AU - Cheng, Jinguang

AU - Zhang, Jianzhong

AU - Zhao, Yusheng

AU - Jin, Changqing

PY - 2015/6/1

Y1 - 2015/6/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84930959250

U2 - 10.1063/1.4922147

DO - 10.1063/1.4922147

M3 - 文章

AN - SCOPUS:84930959250

SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

M1 - 221902

ER -

Hardness, elastic, and electronic properties of chromium monoboride

Abstract

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