Patent ID: 8839889
Filing Date: 2014-09-23
Classification: B24D,C22C,E21B,Y10T

Abstract:
1. A method of forming a polycrystalline diamond compact cutting element for an earth-boring tool, comprising: forming a diamond table comprising a polycrystalline diamond material and a first material disposed in interstitial spaces between inter-bonded diamond crystals of the polycrystalline diamond material; at least substantially removing the first material from the interstitial spaces in a portion of the polycrystalline diamond material in a region of the diamond table adjacent a sidewall of the diamond table and spaced from a cutting face of the diamond table; and introducing a second material formulated to promote a higher rate of degradation of the polycrystalline diamond material responsive to exposure to an elevated temperature than a rate of degradation of the first material under a substantially equivalent elevated temperature into the interstitial spaces between the inter-bonded diamond crystals in the portion of the polycrystalline diamond material.