Raman spectroscopy of pressure-induced amorphous boron carbide

X. Q. Yan; W. J. Li; T. Goto; M. W. Chen

doi:10.1063/1.2189826

Raman spectroscopy of pressure-induced amorphous boron carbide

X. Q. Yan, W. J. Li, T. Goto, M. W. Chen

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

110 Citations (Scopus)

Abstract

We report low- and high-temperature Raman spectroscopy of pressure-induced amorphous boron carbide (a- B4 C). Coarsening of carbon clusters in a- B4 C was characterized during heating, whereas unusual temperature coefficients of a- B4 C Raman peak shifts were observed during cooling. These results experimentally evidence that the amorphization of B4 C is associated with the destruction of the C-B-C chains and a- B4 C is composed of s p2 carbon aromatic rings and boron clusters. This disordered structure with relatively weak carbon s p2 bonds is believed to be responsible for the loss of B4 C shear strength at high pressures.

Original language	English
Article number	131905
Journal	Applied Physics Letters
Volume	88
Issue number	13
DOIs	https://doi.org/10.1063/1.2189826
Publication status	Published - 2006
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2189826

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title = "Raman spectroscopy of pressure-induced amorphous boron carbide",

abstract = "We report low- and high-temperature Raman spectroscopy of pressure-induced amorphous boron carbide (a- B4 C). Coarsening of carbon clusters in a- B4 C was characterized during heating, whereas unusual temperature coefficients of a- B4 C Raman peak shifts were observed during cooling. These results experimentally evidence that the amorphization of B4 C is associated with the destruction of the C-B-C chains and a- B4 C is composed of s p2 carbon aromatic rings and boron clusters. This disordered structure with relatively weak carbon s p2 bonds is believed to be responsible for the loss of B4 C shear strength at high pressures.",

author = "Yan, {X. Q.} and Li, {W. J.} and T. Goto and Chen, {M. W.}",

note = "Funding Information: The authors would like to thank Dr. James McCauley for constructive discussion. This work was sponsored by Japan Society for the Promotion of Science.",

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T1 - Raman spectroscopy of pressure-induced amorphous boron carbide

AU - Yan, X. Q.

AU - Li, W. J.

AU - Goto, T.

AU - Chen, M. W.

N1 - Funding Information: The authors would like to thank Dr. James McCauley for constructive discussion. This work was sponsored by Japan Society for the Promotion of Science.

PY - 2006

Y1 - 2006

N2 - We report low- and high-temperature Raman spectroscopy of pressure-induced amorphous boron carbide (a- B4 C). Coarsening of carbon clusters in a- B4 C was characterized during heating, whereas unusual temperature coefficients of a- B4 C Raman peak shifts were observed during cooling. These results experimentally evidence that the amorphization of B4 C is associated with the destruction of the C-B-C chains and a- B4 C is composed of s p2 carbon aromatic rings and boron clusters. This disordered structure with relatively weak carbon s p2 bonds is believed to be responsible for the loss of B4 C shear strength at high pressures.

AB - We report low- and high-temperature Raman spectroscopy of pressure-induced amorphous boron carbide (a- B4 C). Coarsening of carbon clusters in a- B4 C was characterized during heating, whereas unusual temperature coefficients of a- B4 C Raman peak shifts were observed during cooling. These results experimentally evidence that the amorphization of B4 C is associated with the destruction of the C-B-C chains and a- B4 C is composed of s p2 carbon aromatic rings and boron clusters. This disordered structure with relatively weak carbon s p2 bonds is believed to be responsible for the loss of B4 C shear strength at high pressures.

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SN - 0003-6951

IS - 13

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ER -

Raman spectroscopy of pressure-induced amorphous boron carbide

Abstract

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