Diamond growth in solid substrate from gaseous source

Diamond growth on iron-based materials is extremely important for mechanical and electrical applications because the iron-based materials are widely used in domestic science. In our previous study, chemical-vapor deposition diamond nucleation and subsequent film deposition have been precisely controlled by the residence time of the source gas, which is an essential parameter during chemical-vapor deposition diamond growth. In order to investigate the mechanism of diamond growth on the iron-based materials, the inside of the stainless-steel substrates has been investigated by observing the cross-sectional images after the substrates are fractured by halves. The diamond grains were confirmed in the inside of the stainless-steel substrates. At an optimum condition, diamond growth with high crystalline quality in stainless-steel substrates was identified by Raman spectroscopy and scanning electron microscopy.