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Stages of the temperature gradient growth of HPHT diamonds
Yuri V. Babich, Boris N. Feigelson and Anatoly I. Chepurov
The investigation of crystal dynamics during HPHT diamond growth by conventional temperature gradient method in closed metal-carbon system revealed two main stages. The initial A-stage demonstrates an increase in the mass growth rate of the crystal, and the next B-stage is characterized by its stabilization near the maximum reached level. The first A-stage is assumed to be controlled by the rate of convective transport of carbon. The dissolution of carbon source is supposed as a rate-controlling step for diamond growth during the second B-stage.
Keywords: High pressure, Diamond, Growth.