Polycrystalline diamond cutter with improved abrasion and impact resistance and method of making the same

摘要

Disclosed are a high impact/high abrasion cutter and a method for manufacture. The high impact/high abrasion cutter includes a plurality of preformed polycrystalline abrasive bodies sintered under high temperature/high pressure conditions to form an abrasive cutting table. The impact and abrasion resistance of a cutter can simultaneously be improved through forming a cutting table from larger preformed polycrystalline sintered particles formed from finer grain particles. Such a cutter can be manufactured through the steps of preforming the polycrystalline abrasive bodies, forming a mixture of said polycrystalline abrasive bodies and sintering said mixture under high temperature/high pressure conditions.

主权项

1. A polycrystalline diamond compact, comprising:
a substrate; an abrasive layer bonded to said substrate, the abrasive layer comprising a sintered volume of material including a plurality of preformed polycrystalline abrasive bodies having a plurality of interstitial areas located within each of the plurality of abrasive bodies, the abrasive layer further including a plurality of interstitial spaces located between the plurality of preformed abrasive bodies; wherein each polycrystalline preformed abrasive body comprises a plurality of abrasive particles and a non-metallic material within the plurality of interstitial areas located within the abrasive body and wherein at least some of the interstitial spaces located between the plurality of abrasive bodies contain a catalytic metal material.