Numerous Experiment on Impact Compression of the Mixture of Graphite with Water
L. V. Shurshalov1, A. A. Charakhchtyan1, K. V. Khishchenko2
1Dorodnicyn Computing Centre, Russian Academy of Sciences, Moscow, 119333 Russia
2Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow, 125412 Russia
Keywords: искусственные алмазы, математическое моделирование, графитовые частицы, смесь графита с водой, artificial diamonds, mathematical modeling, graphite particles, mixture of graphite and water
Abstract
This paper describes the problem of the behavior of a mixture of small graphite particles with water in the conditions of shock-wave action at a pressure of 32 GPa and a temperature of up to 1200-1600 K. Graphite particles at these pressures and temperatures are capable of transforming into cubic diamonds or at least into their hexagonal form that is lonsdaleite. It is shown that, for sufficiently small graphite particles of the order of 1 m, their mixture with water for about 10 m can heat up to the above-mentioned temperatures and undergo phase transformation, remain in those conditions for about 50 ms, and then efficiently cool down during the next 50s to the temperatures below 300 K, while remaining in the diamond phase.
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