https://doi.org/10.1351/goldbook.H02824
A term which refers to the solid-state @[email protected] of @[email protected] into @[email protected] by heat treatment under elevated pressure (e.g. \(100\) to \(1000\ \text{MPa}\)) so that a definitely higher degree of @[email protected] is achieved at lower temperature and/or for a shorter heat treatment time than in heat treatment of the same non-graphitic material at atmospheric pressure.