▎ 摘　　要

NOVELTY - Processing (M1) a superabrasive element (310), comprises: providing a superabrasive element comprising a polycrystalline diamond table that comprises a metallic material disposed in interstitial spaces defined within the polycrystalline diamond table comprising a superabrasive face (320), and a superabrasive side surface extending around an outer periphery of the superabrasive face; leaching the metallic material from at least a volume of the polycrystalline diamond table to produce a leached volume in the polycrystalline diamond table; leaching the central portion of the superabrasive face of the superabrasive element to a first leached depth; and leaching a region adjacent to the superabrasive side surface of the superabrasive element to a second leached depth that is greater than the first leached depth. USE - The methods are useful for processing a superabrasive element which is used as cutting elements in a variety of applications, e.g. drilling tools, machining equipment, cutting tools, and other apparatuses, and as bearing elements in a variety of bearing applications e.g. thrust bearings, radial bearings, and other bearing apparatuses. ADVANTAGE - The methods utilize: interstitial material that removes from superabrasive table to a depth beyond the practical limit, e.g. significantly more time, temperature, and/or other process parameter may be required; superabrasive table that may be fully leached so that interstitial material is substantially removed from a substantial portion of superabrasive table; and polycrystalline diamond body that reduce the thermal stability of superabrasive table at elevated temperatures. DETAILED DESCRIPTION - Processing (M1) a superabrasive element, comprises: providing a superabrasive element comprising a polycrystalline diamond table that comprises a metallic material disposed in interstitial spaces defined within the polycrystalline diamond table comprising a superabrasive face, and a superabrasive side surface extending around an outer periphery of the superabrasive face; leaching the metallic material from at least a volume of the polycrystalline diamond table to produce a leached volume in the polycrystalline diamond table by exposing at least a portion of the polycrystalline diamond table to a processing solution, exposing an electrode (340) to the processing solution, positioning the electrode relatively closer in proximity to the superabrasive side surface of the superabrasive element than a central portion of the superabrasive face of the superabrasive element, and applying a charge to the electrode so that a voltage is generated between the polycrystalline diamond table and the electrode and the voltage is applied to the processing solution; leaching the central portion of the superabrasive face of the superabrasive element to a first leached depth; and leaching a region adjacent to the superabrasive side surface of the superabrasive element to a second leached depth that is greater than the first leached depth. INDEPENDENT CLAIMS are also included for: (a) processing (M2) a superabrasive element, comprising producing a leached volume in a polycrystalline diamond table of a superabrasive element, where the polycrystalline diamond table comprises a metallic material disposed in interstitial spaces defined within the polycrystalline diamond table, the producing the leached volume comprises leaching the metallic material from at least a volume of the polycrystalline diamond table, exposing at least a portion of the polycrystalline diamond table to a processing solution, exposing an electrode to the processing solution, applying a charge to the electrode to generate a voltage between the polycrystalline diamond table and the electrode via the processing solution, leaching the metallic material from a portion of the polycrystalline diamond table to a first depth relative to a superabrasive face of the superabrasive element and leaching the metallic material from an external side region of the polycrystalline diamond table to a second depth relative to a superabrasive side surface of the superabrasive element, and the second depth is greater than the first depth; and (b) processing (M2) a superabrasive element, comprising leaching a metallic material from at least a volume of a polycrystalline diamond table of a superabrasive element to produce a leached volume in the polycrystalline diamond table comprising a metallic material disposed in interstitial spaces defined within the polycrystalline diamond table, where the leaching comprises exposing at least a portion of the polycrystalline diamond table to a processing solution, applying a charge to an electrode in communication with processing solution, generating a voltage between the polycrystalline diamond table and the electrode, leaching a region of the polycrystalline diamond table to a first depth underlying a superabrasive face of the superabrasive element and leaching a peripheral region of the polycrystalline diamond table to a second depth relative to a side surface of the superabrasive element, and the second depth is greater than the first depth. DESCRIPTION OF DRAWING(S) - The figure illustrates perspective view of superabrasive element and electrode. Superabrasive element (310) Substrate (312) Element side surface (315) Superabrasive face (320) Electrode (340)