How are explosive shock waves used to make microcrystalline diamond?

Explosive shock waves are utilized in the synthesis of microcrystalline diamond by generating extreme, transient pressures that induce rapid polymorphic transformations in carbon materials.1

In this process, high-velocity shock waves—typically produced by controlled explosions—subject carbon-containing precursors to intense pressure for very short durations, often on the order of a microsecond. These dynamic conditions facilitate the structural transition required to form diamond powder.12

First introduced as a synthesis method in 1961, explosive-shock techniques remain a specialized tool for producing microcrystalline diamond. This material is particularly valued for industrial applications, such as the polishing of gemstones and other exceptionally hard materials. Unlike static high-pressure methods that use apparatus like the diamond-anvil cell to sustain pressure for research, shock-wave synthesis relies on the brief but immense energy release of an explosion to achieve the necessary phase change.21