Abstract
The present work is devoted to a numerical and experimental investigation of the effect of methane decomposition conditions on the growth of diamond structures during gas-jet deposition.The results of experiments on the diamond gas-jet synthesis from methane and hydrogen mixture flows are presented. The direct simulation Monte Carlo method in cylindrical geometry for numerical analysis of these experiments was applied. A one-dimensional approach based on the solution of equilibrium chemical kinetics equations was used to analyze gas-phase methane decomposition. The conducted researches have shown that at decrease in time of decomposition of methane in absence of high temperatures of the fed mixture it is possible to receive higher rates of growth of diamond structures. The obtained results can be useful for optimization of gas-dynamic sources of activated gas diamond synthesis.
Published Version
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