Patent ID: 9539703
Date: 2017-01-10
CPC Classifications: B24D,E21B

Claim:
1. A carbonate polycrystalline diamond body having a working surface opposite a non-working surface, the carbonate polycrystalline diamond body comprising: a first layer comprising a material microstructure comprising a plurality of bonded-together diamond crystals and interstitial spaces therebetween, a portion of the interstitial spaces being occupied by a first concentration of magnesium, the first layer defining the working surface, wherein at least a portion of the magnesium is in the form of magnesium carbonate; a second layer adjacent to the first layer at a location opposite the working surface, the second layer comprising a material microstructure comprising a plurality of bonded-together diamond crystals and interstitial spaces therebetween, a portion of the interstitial spaces being occupied by a second concentration of magnesium greater than the first concentration, wherein at least a portion of the magnesium is in the form of magnesium carbonate; and a quantity of at least one of silicon, aluminum, or a combination thereof in at least one of the first layer or the second layer.