Polycrystalline diamond compact cutter with reduced failure during brazing

摘要

Supported polycrystalline diamond compact (PDC) cutters made under high temperature, high pressure (HT/HP) processing conditions, have non-planar interfaces (12) between the polycrystalline diamond (PCD) layer (10) and the cemented carbide support layer(14). The object of the present invention is to provide a PDC cutter with improved resistance to cracking during installation. The present invention is valuable as an improved way to manufacture PDC cutters with unique properties. The WC-PCD interface geometry of the present invention provides a better match between the WC substrate and the PCD layer. The primary advantage of this interface geometry is enhanced performance and reduced installation and/ or brazing breakage due to improved residual stress at the WC-PCD interface.