Patent ID: 11946320
Assignee: US SYNTHETIC CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC E  B  C | IPC B  C  E

Claim 9:
10. A method of fabricating a polycrystalline diamond element, the method comprising:
placing diamond particles in a diamond particulate volume into a pressure transmitting medium, the diamond particulate volume comprising:
a first volume of the diamond particles including a material comprising a group 13 element; and
a second volume of the diamond particles having a lower concentration of the material comprising the group 13 element than the first volume of the diamond particles;

positioning the second volume of the diamond particles to define at least a portion of a working surface of the polycrystalline diamond element;
enclosing the diamond particles in the diamond particulate volume in the pressure transmitting medium to define a cell assembly;
subjecting the cell assembly to a high-pressure/high-temperature process to define a polycrystalline diamond table; and
leaching at least a portion of the polycrystalline diamond table.