Depressurization amorphization of single-crystal boron carbide

X. Q. Yan; Z. Tang; L. Zhang; J. J. Guo; C. Q. Jin; Y. Zhang; T. Goto; J. W. McCauley; M. W. Chen

doi:10.1103/PhysRevLett.102.075505

Depressurization amorphization of single-crystal boron carbide

X. Q. Yan, Z. Tang, L. Zhang, J. J. Guo, C. Q. Jin, Y. Zhang, T. Goto, J. W. McCauley, M. W. Chen

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

153 Citations (Scopus)

Abstract

We report depressurization amorphization of single-crystal boron carbide (B4C) investigated by in situ high-pressure Raman spectroscopy. It was found that localized amorphization of B4C takes place during unloading from high pressures, and nonhydrostatic stresses play a critical role in the high-pressure phase transition. First-principles molecular dynamics simulations reveal that the depressurization amorphization results from pressure-induced irreversible bending of C-B-C atomic chains cross-linking 12 atom icosahedra at the rhombohedral vertices.

Original language	English
Article number	075505
Journal	Physical review letters
Volume	102
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.102.075505
Publication status	Published - 2009 Feb 20
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.102.075505

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title = "Depressurization amorphization of single-crystal boron carbide",

abstract = "We report depressurization amorphization of single-crystal boron carbide (B4C) investigated by in situ high-pressure Raman spectroscopy. It was found that localized amorphization of B4C takes place during unloading from high pressures, and nonhydrostatic stresses play a critical role in the high-pressure phase transition. First-principles molecular dynamics simulations reveal that the depressurization amorphization results from pressure-induced irreversible bending of C-B-C atomic chains cross-linking 12 atom icosahedra at the rhombohedral vertices.",

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AU - Yan, X. Q.

AU - Tang, Z.

AU - Zhang, L.

AU - Guo, J. J.

AU - Jin, C. Q.

AU - Zhang, Y.

AU - Goto, T.

AU - McCauley, J. W.

AU - Chen, M. W.

PY - 2009/2/20

Y1 - 2009/2/20

N2 - We report depressurization amorphization of single-crystal boron carbide (B4C) investigated by in situ high-pressure Raman spectroscopy. It was found that localized amorphization of B4C takes place during unloading from high pressures, and nonhydrostatic stresses play a critical role in the high-pressure phase transition. First-principles molecular dynamics simulations reveal that the depressurization amorphization results from pressure-induced irreversible bending of C-B-C atomic chains cross-linking 12 atom icosahedra at the rhombohedral vertices.

AB - We report depressurization amorphization of single-crystal boron carbide (B4C) investigated by in situ high-pressure Raman spectroscopy. It was found that localized amorphization of B4C takes place during unloading from high pressures, and nonhydrostatic stresses play a critical role in the high-pressure phase transition. First-principles molecular dynamics simulations reveal that the depressurization amorphization results from pressure-induced irreversible bending of C-B-C atomic chains cross-linking 12 atom icosahedra at the rhombohedral vertices.

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Depressurization amorphization of single-crystal boron carbide

Abstract

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