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Synthesis of diamond crystals and films using an oxygen-acetylene flame under atmosheric pressure
Authors:H -C Chiao  H -L Lin  X -T Li  C -X Ding
Affiliation:(1) Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
Abstract:Diamond growth with rates up to 100 to 140 μm/hr was achieved using an oxygen-acetylene combustion spraying technique in an atmospheric environment. Investigations on the processing indicated that the gas flow ratio, substrate position, substrate temperature, temperature distribution, and substrate pretreatment were the most important factors affecting the growth of diamond crystals. Evaluation by means of X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and electron probe microanalysis showed that the synthesized diamond was nearly perfect in morphology, structure, and purity.
Keywords:gas flow ratio  oxygen-acetylene combustion  synthetic diamond  wear resistant coatings  diamond-like coatings
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