CVD diamond coating: a technology for tools of future

Possibility of Chemical Vapour Deposited (CVD) diamond coating on precision and complex geometry gave an extra edge over PCDs. Diamond-coating challenges are amplified by the fact that the primary market demand is for diamond coating on existing grades of tungsten carbide or steel tools. In this paper, we have reviewed some of the efforts made in the direction of improving quality and adhesion of diamond films to the respective substrates. With the advent of nanodiamond coating with reduced surface roughness and improved hardness, the machining of Metal Matrix Composites was made more economical.