Currently the main diamond processing method has the following four: film-coated tools, welding thick-film diamond cutting tools, diamond cutting tools and single-crystal diamond sintered body tool.
Thin Film Coated Tools
Film-coated tools are rigid and high-temperature characteristics of a good collective material deposited diamond film is formed by chemical vapor deposition (cvd) tool. Since sin4 ceramics, wc + thermal expansion coefficient of diamond and carbide-based metal w co close, small thermal stress generated during film, it can be used as the base material of the cutter body. wc + co-based alloy, the binder phase co existence between easy to make diamond film and the substrate is formed of graphite and reduce the adhesive strength, the need for pre-treatment prior to deposition in order to eliminate the influence of co (typically by acid etching to co) .
Chemical vapor deposition method is the use of certain of the source gas containing activated c, at very low gas pressure, so that the carbon atoms deposited in a certain area, the carbon atoms in the condensed, forming a diamond-phase deposition process. Currently used for the deposition of diamond cvd law include: microwave, hot filament, DC arc jet method.