METHODS OF FABRICATING CUTTING ELEMENTS INCLUDING ADHESION MATERIALS FOR EARTH-BORING TOOLS

摘要

A cutting element for an earth-boring drill bit may include a thermally stable cutting table comprising a polycrystalline diamond material. The polycrystalline diamond material may consist essentially of a matrix of diamond particles bonded to one another and a silicon, silicon carbide, or silicon and silicon carbide material located within interstitial spaces among interbonded diamond particles of the matrix of diamond particles. The cutting table may be at least substantially free of Group VIII metal or alloy catalyst material. The cutting element may further include a substrate and an adhesion material between and bonded to the cutting table and the substrate. The adhesion material may include diamond particles bonded to one another and to the cutting table and the substrate after formation of the preformed cutting table.

主权项

1. A method for fabricating a cutting element for use with an earth-boring drill bit, comprising:
introducing a substrate into a synthesis cell assembly; exposing a surface of the substrate to diamond particles; introducing a preformed cutting table into the synthesis cell assembly, a base surface of the preformed cutting table in contact with the diamond particles, the preformed cutting table on an opposite side of the diamond particles from the substrate; and pressing the preformed cutting table and the substrate against one another in the presence of sufficient heat to bond the preformed cutting table to the substrate by creating diamond-to-diamond bonds between the preformed cutting table and the diamond particles and by creating bonds between the diamond particles and the substrate.