Numerical Simulation of Shock Compression of Liquid and Vaporous Water for Determining Conditions of Diamond Synthesis from Graphite

Abstract

Examples of calculating the shock compression of liquid water and water vapor using a slightly corrected simplified Nigmatulin–Bolotnova equation of state of water are considered. The main attention is paid to the achievement of those numerical simulation parameters (primarily, water temperature) that may be useful for synthesizing diamond from graphite. It is shown that a favorable factor for achieving a required temperature is the shock compression of a preheated layer of liquid water. It seems even more promising to use a layer of heated water vapor instead of liquid water. In the latter case, reaching the required temperatures and pressures requires a significantly lower velocity of the impactor.