Method of making a diamond particle suspension and method of making a polycrystalline diamond article therefrom

A method of forming a polycrystalline diamond compact from a substantially homogeneous suspension of nanodiamond particles, microdiamond particles, and metal solvent-catalyst particles, comprising:

• disposing a first functional group on a plurality of nanodiamond particles to form derivatized nanodiamond particles;
• combining the derivatized nanodiamond particles with a plurality of microdiamond particles, metal solvent-catalyst particles, and a solvent to form a substantially homogeneous suspension of the derivatized nanodiamond particles, microdiamond particle and metal solvent-catalyst particles in the solvent;
• and
• forming a polycrystalline diamond compact from the homogenous suspension of derivatized nanodiamond particles, microdiamond particles, and metal solvent catalyst particles, wherein forming comprises:
• forming a polycrystalline diamond precursor by removing the solvent, and
• processing the polycrystalline diamond precursor under conditions of heating and pressure to form the polycrystalline diamond compact, the polycrystalline diamond compact comprising a superabrasive.