The graphitization process and the synthesis of diamonds from a C–Ni–Mn system Original Research Article

The influence of the “degree of graphitization” on the synthesis of diamond obtained from a HP–HT process using an anvil type high pressure device was studied for different types of graphites. The “degree of graphitization” was measured by a new parameter the percentage of hexagonal perfection (PHP). Results have shown that for samples with a PHP below 50% no diamond was formed. This suggested that a minimum “degree of graphitization” must be present for a successful HP–HT for diamond synthesis.