CVD diamond films

CVD diamond filmsis the chemical vapor deposition diamond (also named CVD diamond films, diamond thick films). It is another significant revolution in synthetic diamond fields after the synthesis of diamond under high temperature and high pressure. Its size can be great, which is reaching 20 mm diameter and 2 mm thickness in mass production at present. And the crystal quality can be compared with natural IIa diamond. At a low-pressure condition, the gases containing carbon such as CH4 and C3H8 will pyrolysis. Then with the effect of activation radical as H+ and OH, pure polycrystal diamond will be deposited on solid substrates. The main synthesis methods of CVD diamond films include: Hot-filament CVD, DC Arc Plasma Jet CVD, Microwave plasma CVD, DC hot cathode plasma CVD. ** CVD DIAMOND freestanding films CVD diamond for mechanical grade application ----CDK ----CDY CDK------standard type The cvd diamond produced by hot-filament is black and lighttight. It is the pure diamond with polycrystalline structure, without any metal and non-metallic agglomerant and suitable for the high level wear occasion use. Application field 1) Dressing tool, including: Multipoint diamond dressing tool Diamond dressing idler wheel For dressing: Palm corundum and carborundum grinding wheel Diamond grinding wheel CBN grinding wheel 2) CVD diamond cutting tools For cutting: Hard metal alloy, copper and copper alloy, aluminum alloy and other nonferrous metal. Engineering plastics Complex materials 3) Wear parts the performance parameters of CDK Vickers-hardnesskg/mm2 8000 densityg/cm 3.52 youngs module(Gpa) 850 Thermal >8 Chemistry stability Does not dissolve into any acid and alkali rupture strengthMpa0.5mm,Thickness, 450 Thermal stability800 degree grind ratioten thousand 10-20