Diamond product manufacturing method

There are four main processing methods for diamond: thin film coating tools, thick film diamond welding tools, diamond sintered body tools and single crystal diamond tools. 2.1 Film Coated Tools Film Coated Tools are tools made of diamond films made by chemical vapor deposition (CVD) on collective materials with good rigidity and high temperature characteristics. Since the thermal expansion system of Si3N4-based ceramics, WC-Co-based carbides and metal W is close to diamond, the thermal stress generated during film making is small, so it can be used as the base material of the knife body. In WC-Co-based cemented carbide, the presence of the bonded phase Co can easily form graphite between the diamond film and the substrate, reducing the adhesion strength. Pretreatment is required before deposition to eliminate the influence of Co (usually decoding Co through acid corrosion). The chemical vapor deposition method uses a certain method to activate the gas containing C source, and at extremely low gas pressure,