Article

Thermophysical Properties of Materials
2010. V. 48. № 6. P. 806–814
Kanel' G.I., Bezruchko G.S., Savinykh A.S., Razorenov S.V., Milyavskii V.V., Khishchenko K.V.
Submicrosecond polymorphic transformations accompanying shock compression of graphite
Annotation
The effect of the structure factors and temperature on the transformation of shock-compressed graphite to diamond or a diamond-like phase has been investigated. It has been revealed a significant effect of the shock compression direction with respect to the crystallographic planes of graphite on the detected pressure and rate of the transformation. The effect is more pronounced in more ordered graphite. The main structure parameter determining the transformation rate is the degree of the three-dimensional ordering of graphite. The transformation pressure decreases with heating. The extrapolation of the results to the high-temperature region and their comparison with the data on the direct transformation of statically compressed graphite to diamond indicate that the “above-barrier” state should be apparently reached to ensure the irreducible transformation to cubic diamond.
Article reference:
Kanel' G.I., Bezruchko G.S., Savinykh A.S., Razorenov S.V., Milyavskii V.V., Khishchenko K.V. Submicrosecond polymorphic transformations accompanying shock compression of graphite, High Temp., 2010. V. 48. № 6. P. 806