Diamond is the hardest material known. This hardness gives it the
superior performance of cutting any other material. PDC is
extremely important for drilling because it aggregates tiny, cheap
man-made diamonds into relatively large, mutually-grown randomly
oriented crystal masses, which can form useful shapes called
diamond tables. The diamond table is the part of the cutter that
touches the formation. In addition to hardness, PDC diamond
countertops also have the basic characteristics of drill tools:
they are effectively combined with tungsten carbide materials that
can be brazed (attached) to the drill body. The diamonds themselves
are not glued together, nor can they be joined together by brazing.
