POLYCRYSTALLINE DIAMOND MATERIALS HAVING IMPROVED ABRASION RESISTANCE, THERMAL STABILITY AND IMPACT RESISTANCE

摘要

PCD materials comprise a diamond body having bonded diamond crystals and interstitial regions disposed among the crystals. The diamond body is formed from diamond grains and a catalyst material at high pressure/high temperature conditions. The diamond grains have an average particle size of about 0.03 mm or greater. At least a portion of the diamond body has a high diamond volume content of greater than about 93 percent by volume. The entire diamond body can comprise high volume content diamond or a region of the diamond body can comprise the high volume content diamond. The diamond body includes a working surface, a first region substantially free of the catalyst material, and a second region that includes the catalyst material. At least a portion of the first region extends from the working surface to depth of from about 0.01 to about 0.1 mm.

主权项

1. A cutting element comprising:
a polycrystalline diamond body comprising a plurality of bonded diamond crystals and a plurality of interstitial regions disposed among the crystals, the body comprising a first region substantially free of a catalyst material used to sinter the diamond body and a second region that includes the catalyst material, wherein at least a portion of the first region extends from a working surface of the body to a depth of less than about 0.08 mm, and wherein the diamond body includes a diamond content greater than about 93 percent by volume at first location and a diamond content less than about 93 percent at a second location; and a substrate joined to the diamond body selected from the group consisting of metallic materials, ceramic materials, cermet materials and mixtures thereof.