Development of an Apparatus for Fabricating CVD Diamond Powders

Abstract

An apparatus for fabricating diamond powders by means of arc-discharge plasma jet CVD (chemical vapor deposition) method was developed with an attachment for collecting the fabricated powders. It was found that a nickel substrate is the best material for fabrication and a scratching brush made of piano wire of diameter 0.2mm is fit for collecting diamond powders. With this apparatus, diamond powders of diameter 15μm can be fabricated in 5 minutes, and the collecting ratio is 60%, that is 12.4mg per hour.