Polycrystalline diamond element

A method for manufacturing a PCD element;

• the method including providing a PCD body having internal diamond surfaces, the internal diamond surfaces defining interstices, the PCD body containing a thermally stable region and a porous region, in which at least some of the interstices contain at least partly unfilled pores;
• introducing a mask or passivation medium proximate or into the thermally stable region;
• and introducing at least one infiltrant material into the porous region, the mask or passivation medium at least partly isolating diamond of the thermally stable region from chemical interaction with the at least one infiltrant material, wherein a controlled temperature cycle is employed in such a manner as to allow sufficient or a certain amount of the mask or passivation medium or its precursor to be introduced proximate or into the thermally stable region prior to the at least one infiltrant material melting and infiltrating into the porous PCD body.

A method for manufacturing a PCD element;

• the method including providing a PCD body having internal diamond surfaces, the internal diamond surfaces defining interstices, the PCD body containing a thermally stable region and a porous region, in which at least some of the interstices contain at least partly unfilled pores;
• introducing a mask or passivation medium proximate or into the thermally stable region;
• and thereafter introducing at least one infiltrant material into the porous region, the mask or passivation medium at least partly isolating diamond of the thermally stable region from chemical interaction with the at least one infiltrant material.

A method for manufacturing a PCD element;

• the method including providing a PCD body having internal diamond surfaces, the internal diamond surfaces defining interstices, the PCD body containing a thermally stable region and a porous region, in which at least some of the interstices contain at least partly unfilled pores;
• introducing a mask or passivation medium proximate or into the thermally stable region;
• and introducing at least one infiltrant material into the porous region, the mask or passivation medium at least partly isolating diamond of the thermally stable region from chemical interaction with the at least one infiltrant material, the mask or passivation medium being introduced proximate or into the thermally stable region under conditions other than HPHT conditions.