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 | |
| Publication status | Published - 2006 Apr 10 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Cite this
Yan, X. Q., Li, W. J., Goto, T., & Chen, M. W. (2006). Raman spectroscopy of pressure-induced amorphous boron carbide. Applied Physics Letters, 88(13), [131905]. https://doi.org/10.1063/1.2189826