Raman spectroscopy of glassy carbon up to 60 GPa

Abstract

In the present work in experiments in a diamond anvil cell at room temperature we studied the behavior of glassy carbon under high pressure up to 60 GPa by means of in situ Raman spectroscopy. Raman bands typical for glassy carbon were clearly observed in the entire pressure interval. We did not see any noticeable changes in the type of chemical bonding in glassy carbon up to the highest pressure reached. The yield strength of the material under confining pressure was found to be maximum of about 7 GPa, inconsiderably higher than that measured at ambient pressure (1.4 GPa on literature data).