Polymerization principle of polycrystalline diamond compacts

Polycrystalline diamond compact (PDC compact) is a superhard material in which synthetic diamond particles and cemented carbide substrates are polymerized under high temperature and high pressure conditions. The main components of the PDC composite sheet are synthetic diamond particles and cemented carbide. Under high temperature and high pressure, through the catalysis of metal cobalt, the diamond particles are closely bonded to the cemented carbide. Since the shrinkage rate of cemented carbide is 2.5 times faster than that of diamond, during the cooling process after sintering is completed, cemented carbide and diamond are aggregated into a whole, thereby aggregated into a polycrystalline diamond compact.

       The polycrystalline diamond composite sheet is composed of diamond particles and cemented carbide. It has the characteristics of diamond and inherits the advantages of cemented carbide. The synthesized PDC composite sheet has wear resistance, impact resistance and good thermal stability, and is very suitable for the fields of underground oil drilling and coal mining with high temperature and strong impact.

       In 1971, General Motors Corporation of the United States developed the first PDC composite sheet, which later proved that this PDC technology has driven many industrial products and technologies to innovate. The first PDC composite sheet used in the oil and gas field was born in 1973, after 3 years of laboratory development and field testing in oil fields. In 1976, PDC composite sheet was formally introduced and successfully used in oil and gas extraction.