The characteristics of Ib diamond crystals synthesized in a Fe–Ni–C system with different SiC contents

The influence of different SiC doping contents on the synthesis of diamond crystals in the Fe–Ni–C system was investigated.

An effective method for elimination of the defects in diamond caused by physical field asymmetry in high-pressure synthesis cavities

FEM was used to explain the mechanism of diamond growth defects and methods were proposed to eliminate the growth defects.

Study on the characteristics of Ib diamond crystals synthesized with Fe3O4 doped in an Fe–Ni–C system

Fe₃O₄ is a common earth mineral, which often exists in the form of inclusions in natural diamond.

Method to reduce the oil pressure during HPHT diamond synthesis: FEM simulations and experiments

Here, a new type of supercharged cell assembly is proposed that can effectively reduce the oil pressure during high-pressure, high-temperature (HPHT) diamond synthesis.

An effective method to improve the growth rate of large single crystal diamonds under HPHT processes: optimized design of the catalyst geometric construction

In this work, we presented the influence of catalyst geometric construction on temperature distribution, flow structure, the transport processes of the carbon atoms, and the resulting diamond growth in the process of HPHT diamond synthesis. Several catalyst geometry models were tested, and the experimental results of growth rates were compared with numerical simulations. We revealed that increasing the protrusion diameter of the convex-shaped catalysts could significantly improve the growth rate of diamonds. The diamond growth rate was improved from 1.6 mg h⁻¹ to 4 mg h⁻¹ when the protrusion diameter was enlarged by 2 mm. These results will be discussed through the characteristic distributions of the temperature and convection fields in the process of diamond growth.

In this work, we presented the influence of catalyst geometric construction on temperature distribution, flow structure, the transport processes of the carbon atoms, and the resulting diamond growth in the process of HPHT diamond synthesis.