Polycrystalline diamond, polycrystalline diamond compacts, methods of making same, and applications

A polycrystalline diamond compact, comprising:

• a polycrystalline diamond table, at least an unleached portion of the polycrystalline diamond table including:
• a plurality of diamond grains directly bonded together via diamond-to-diamond bonding to define a plurality of interstitial regions, the plurality of diamond grains exhibiting an average grain size of about 30 μm or less;
• a catalyst occupying at least a portion of the plurality of interstitial regions;
• an average electrical conductivity of about 25 S/m to about 1200 S/m;
• a coercivity of about 115 Oe to about 250 Oe;
• a specific magnetic saturation of about 5 G·cm3/g to about 15 G·cm3/g;
• and
• a substrate bonded to the polycrystalline diamond table;
• and
• a Gratio of at least about 4.0×106.

A polycrystalline diamond compact, comprising:

• a polycrystalline diamond table sintered exhibiting one or more characteristics of being sintered at a cell pressure of at least about 7.5 GPa, at least an unleached portion of the polycrystalline diamond table including:
• a plurality of diamond grains bonded together via diamond-to-diamond bonding to define a plurality of interstitial regions, the plurality of diamond grains exhibiting an average grain size of about 10 μm to about 18 μm;
• and
• a catalyst including cobalt, the catalyst occupying at least a portion of the plurality of interstitial regions;
• an average electrical conductivity of about 25 S/m to about 1200 S/m;
• a coercivity of about 115 Oe to about 175 Oe;
• a specific magnetic saturation of about 10 G·cm3/g to about 15 G·cm3/g or less;
• a specific permeability less than about 0.10 G·cm3/g·Oe;
• and
• a thermal stability, as determined by distance cut, prior to failure in a vertical lathe test, of at least about 1300 m;
• and
• a substrate bonded to the polycrystalline diamond table along an interfacial surface.