Polycrystalline Diamond Manufacturing Process

3 Mechanisms involyed in Polycrystalline Diamond Manufacturing Process 

The pcD manufacturing process can be roughly divided into three stages cold compaction, hot compaction, and liquid phase sintering of the diamond compact. 

Kolomiitsev [147] and Uehara [148] studied the compaction behavior of diamond compacts under high pressures. Kolomiitsev showed that there are basically three processes taking place during cold compaction, see Fig. 22 particle rearrangement, crushing of diamond particles, and filling of voids by crushed particles. 

Crushing of diamond particles during this stage dramatically shifts the particle size distribution. 

The powder, which has a lower number of sharp edges per particle, is more stable to compression forces than the one with many spallings, sharp edges, etc. Since their weakest planes are the planes where they contain inclusions the density, size and shape of the inclusions may be a critical factor in the crushing of diamond particles during the cold compaction stage. 

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