Abstract
Single crystal graphite specimens were compressed at a room temperature in the diamond anvil cell in the c-axis direction. High pressure values up to 58 GPa and shear deformation up to 30° were used.
We found out appearance of filament-like or lamella structures. Their appearance is result of formation of two mutually perpendicular frameworks of graphite. Schemes of possible co-arrangement of two mutually perpendicular graphite frameworks are proposed. This construction should lead to formation of straight lines of carbon atoms, which associated with sp3- bonds along this boundary. Presence of weak band at 1150 cm−1 in Raman spectra as well as equality of intensity of D- and G- peaks can be considered as an evidence for the presence of sp3-bonds. We observed increase in elastic modulus of the surface of our specimens by Scanning Probe Microscopy method.
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Blank, V. et al. (2005). Peculiarities of Graphite Transformation under High Pressure. In: Lee, J., Novikov, N., Turkevich, V. (eds) Innovative Superhard Materials and Sustainable Coatings for Advanced Manufacturing. NATO Science Series II: Mathematics, Physics and Chemistry, vol 200. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3471-7_14
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DOI: https://doi.org/10.1007/1-4020-3471-7_14
Publisher Name: Springer, Dordrecht
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