The globe-like diamond microcrystalline-aggregates were fabricated by microwave plasma chemical vapor deposition(MPCVD) method.

Diamond films were generally deposited on the substrates by using chemical vapor deposition (CVD), introducing a hydrocarbon gas diluted with an amount of hydrogen gas.

Experimental Study on the Grindability of PCD;

The stress distribution of polycrystalline diamond (PCD) tool while ma chining Al2O3 ceramics overlay on compound floor is analyzed by using finite ele ment method (FEM).

One kind of PCD boring tool and a fine adjustment boring bar,which are suitably used in precision finishing the surface of pinhole of combustion engine piston,are introduced.

Optics microscope and X-ray diffraction(XRD) were used to investigate the solvent metal covering on diamond single crystal synthesized by iron-based alloy catalyst and graphite under different synthesized technics at high temperature and high pressure(HTHP).

Scanning electron microscope(SEM) and Energy Dispersive Spectroscope(EDS) were used to investigate the effects of procedure parameters on the structures and composition of the metallic film covering on diamond single crystal from a graphite-Ni70Mn25Co5 system under high temperature and high pressure(HTHP).

The development of study on synthesizing diamond single crystal,thin film and nanocrystal with un-graphite materials is summarized.

Based on the analyses of current applications and performances of the polycrystalline diamonds used in drilling at home and abroad,a type of □1×1×1 interfacially grown polycrystalline diamond has been developed.