| 摘要 |
The invention is for a polycrystalline diamond abrasive compact comprising a layer of polycrystalline diamond bonded to a cemented tungsten carbide substrate. The polycrystalline diamond defines a plurality of interstices and a binder phase is distributed in the interstices to form binder pools. The polycrystalline diamond is characterised by the presence of a separate tungsten particulate phase in the binder phase, in excess of 0.05 volume % but not greater than 2 volume %, expressed as a % of the total polycrystalline diamond, and the binder phase further containing a low eta-phase, Co3W3C, content as determined by conventional XRD analysis, an XRD peak height of the <511 > eta-phase (Co3W3C) peak which is less than 0.06 when expressed as a fraction of the peak height of the <200> cubic cobalt peak. The invention extends to a composition and to a method for manufacturing the polycrystalline diamond abrasive compact.
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