Patent ID: 8231698

Claim:
A polycrystalline diamond abrasive compact comprising a layer of polycrystalline diamond bonded to a cemented tungsten carbide substrate, the polycrystalline diamond comprising a coherent matrix of diamond particles bonded to one another and defining a plurality of interstices and a binder phase being distributed in the interstices to form binder pools, the polycrystalline diamond being characterised by the presence of a separate tungsten particulate phase in the binder phase, the tungsten particulate phase being present in an amount in excess of 0.05 volume % but not greater than 1.5 volume %, expressed as a % of the total polycrystalline diamond, and the binder phase further containing a low eta-phase, Co 3 W 3 C, content as determined by conventional XRD analysis, an XRD peak height of the <511> eta-phase (Co 3 W 3 C) peak (after background correction) which is less than 0.06 when expressed as a fraction of the peak height of the <200> cubic cobalt peak.