Nano-crystalline Diamond Coated Carbide Ball Description (1/2)

Nano-crystalline diamond coating usually used in plane, the sphere or curve like tungsten carbide ball requires some new process, which is different from conventional chemical vapor deposition (CVD) and physical vapor deposition (PVD). Based on the conventional process, new processes adapt to broader prospect according to the difference of physical properties, chemical properties, and shape or surface characteristics, such as microwave plasma chemical vapor deposition (MPCVD, deposits nano-crystalline diamond film with silicon substrate at 750℃.), hot filament chemical vapor deposition (HFCVD, it can fabricate spherical diamond film with 3μm of thickness), direct current arc plasma jet (it manage to prepare spherical diamond film on molybdenum substrate, which thickness is more than 500μm.)

The significance of nano-crystalline diamond coating on cemented carbide ball is that it can effectively reduce the abrasion of mechanical equipment components, which is also the direct reason of some mechanical parts failure. With the development of technology, the requirements of conditions of mechanical equipment are becoming strict, such as ultra-high temperature or ultra-low temperature, high load and high vacuum degree, which brings great difficulties to the mechanical equipments. If only depends on conventional lubricant grease, it is hard to adapt to the requirements at present which provides broad developing space for solid lubricant.