A thermostable polycrystalline diamond body is produced by pre-treating the diamond crystals with molten base or salt, mixing the pre-treated diamond crystals with silicon powder or a blend of silicon and one or more substances, subjecting the mixture to a combination of high-pressure and high-temperature and maintaining the pressure and temperature for a period of time. The thermostable polycrystalline diamond body is characterized in having diamond crystals uniformly distributed in the body. The diamond crystals are covered by .beta.-silicon carbide and that the diamond crystals together with .beta.-silicon carbide form an uninterrupted framework throughout the entire body, the interstices of which are filled with elemental silicon or silicon-containing refractory phases. A polygonal graphite mold having walls of equal thickness useful in the production of said thermostable polycrystalline diamond body is also provided.
9657529 Polycrystalline diamond compact including a pre-sintered polycrystalline diamond table including a nonmetallic catalyst that limits infiltration of a metallic-catalyst infiltrant therein and applications therefor
* 8734552 Methods of fabricating polycrystalline diamond and polycrystalline diamond compacts with a carbonate material
9103172 Polycrystalline diamond compact including a pre-sintered polycrystalline diamond table including a nonmetallic catalyst that limits infiltration of a metallic-catalyst infiltrant therein and applications therefor
* 9352447 Superabrasive elements and methods for processing and manufacturing the same using protective layers
* 2011/0056,141 Superabrasive Elements and Methods for Processing and Manufacturing the Same Using Protective Layers
8461832 Method of characterizing a polycrystalline diamond element by at least one magnetic measurement
* 2010/0225,311 METHOD OF CHARACTERIZING A POLYCRYSTALLINE DIAMOND ELEMENT BY AT LEAST ONE MAGNETIC MEASUREMENT
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