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Effects of temperature and filament poisoning on diamond growth in hot-filament reactors

The growth of diamond in a hot-filament reactor has been modeled, and compared with existing experimental data. Studies have been carried out on non-growth systems containing only hydrogen, as well as on systems where the methane concentration at the inlet was varied between 0.4% and 7.2%. The one-d...

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Published in:	Journal of applied physics 1994-09, Vol.76 (5), p.3102-3113
Main Authors:	Dandy, David S., Coltrin, Michael E.
Format:	Article
Language:	English
Subjects:	ALKANES CARBON CHEMICAL COATING CHEMICAL REACTIONS CHEMICAL VAPOR DEPOSITION DEPOSITION DIAMONDS ELEMENTAL MINERALS ELEMENTS FILAMENTS FLUID FLOW GROWTH HYDROCARBONS HYDROGEN IRRADIATION REACTORS MATERIALS PROCESSING REACTORS MATERIALS SCIENCE METHANE MINERALS NONMETALS ORGANIC COMPOUNDS REACTORS SURFACE COATING 360606 > Other Materials-- Physical Properties-- (1992-)
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description	The growth of diamond in a hot-filament reactor has been modeled, and compared with existing experimental data. Studies have been carried out on non-growth systems containing only hydrogen, as well as on systems where the methane concentration at the inlet was varied between 0.4% and 7.2%. The one-dimensional stagnation flow model used here includes detailed gas-phase and surface kinetics. A simple model of filament poisoning has been implemented. The effect of the gas/filament temperature discontinuity on species distributions has also been examined. Gross errors between theory and experiment are obtained when filament poisoning is neglected, but good agreement is found using a simple linear poisoning model. A nonzero temperature discontinuity at the filament produces good overall agreement with experiment.
doi_str_mv	10.1063/1.357492
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source	AIP Digital Archive
subjects	ALKANES CARBON CHEMICAL COATING CHEMICAL REACTIONS CHEMICAL VAPOR DEPOSITION DEPOSITION DIAMONDS ELEMENTAL MINERALS ELEMENTS FILAMENTS FLUID FLOW GROWTH HYDROCARBONS HYDROGEN IRRADIATION REACTORS MATERIALS PROCESSING REACTORS MATERIALS SCIENCE METHANE MINERALS NONMETALS ORGANIC COMPOUNDS REACTORS SURFACE COATING 360606 -- Other Materials-- Physical Properties-- (1992-)
title	Effects of temperature and filament poisoning on diamond growth in hot-filament reactors
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