Carbonate PCD with a distribution of Si and/or Al
AssigneeSmith International, Inc.
InventorYahua Bao
Life of this patent
Estimating the term…
Abstract
A method for making a carbonate polycrystalline diamond body includes combining a first quantity of diamond with a first quantity of magnesium carbonate to form a first layer for forming a working surface, and combining a second quantity of magnesium carbonate to form a second layer adjacent to the first layer, forming an assembly. The method includes placing a quantity of silicon or aluminum in or adjacent to at least a portion of the assembly and sintering the assembly including the silicon or aluminum at high pressure and high temperature, causing the silicon or aluminum to infiltrate at least one layer of the assembly.
Claims12
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.
Dependencies are inferred from the claim text.