Shock compression and flash heating of graphite/metal mixtures at temperatures up to 3200 K and pressures up to 25 GPa
- 1 September 1984
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 56 (5) , 1440-1454
- https://doi.org/10.1063/1.334116
Abstract
Different aspects of phase‐transition processes in carbon in dynamic conditions were studied. Samples of graphite/metal mixtures have been recovered and analyzed after exposure to the combined action of high temperature and pressure pulses generated by a unique flash‐heating hemispherical implosion system. Transmission electron microscopy together with x‐ray and electron diffraction examinations proved the existence of diamond, different forms of graphite, and carbynes in the samples. A mechanism of formation of diamond is proposed which relies on a solid‐vapor‐liquid‐solid (SVLS) sequence of phase transformations. The experimental results were found to be in reasonable agreement with the proposed SVLS model. A tetragonally crystallized diamondlike carbon phase ( p‐diamond) was identified in the course of the work as well as a new linear carbon polymorph (Carbon‐XIV).This publication has 60 references indexed in Scilit:
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