Role of graphite crystal structure on the shock-induced formation of cubic and hexagonal diamond
Travis J. Volz, Stefan J. Turneaure, Surinder M. Sharma, Y. M. Gupta
Abstract
During shock wave compression at about 500,000 atm of pressure and of about 100 nanoseconds duration, graphite is transformed into either hexagonal diamond or cubic diamond, depending on the crystal structure of the graphite crystallites that make up the sample. The figure shows x-ray diffraction data for two types of graphite: (a) and (b) show data for graphite crystallites having hexagonal structure, while (c) and (d) show data for graphite crystallites having turbostratic structure.
Topics & Concepts
GraphiteMaterials scienceCrystalliteDiamondHexagonal crystal systemDiffractionCrystallographyCrystal structureCrystal (programming language)Diamond cubicDiamond typeCondensed matter physicsMaterial properties of diamondComposite materialOpticsMetallurgyChemistryPhysicsComputer scienceProgramming languageHigh-pressure geophysics and materialsDiamond and Carbon-based Materials ResearchEnergetic Materials and Combustion