High Rate Diamond Deposition by Cooled Acetylene/ Oxygen Combustion Flame

摘要

Since the combustion flame method using acetylene/oxygen is a high rate diamond synthesis process can be conducted in open air, this process is thought to be useful for low cost diamond production. In this study, to develop a method for diamond synthesis on a thick and/or complicated shape article, diamond depositions by water-cooled and air-cooled combustion flames were carried out. It was proved that diamonds could be deposited on 3 and 5 mm thick 304 stainless steel substrates without melt down of the substrate. Besides, in the case of 15 l/min in air flow rate, diamond like hexahedron and octahedron particles could be synthesized on the substrate without meltdown of the substrate even in the condition without substrate bottom cooling.