Polycrystalline diamond compact including pre-sintered polycrystalline diamond table having a thermally-stable region and applications therefor
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United States of America Patent
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Jun 28, 2016
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app pub date -
Jul 9, 2014
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Jan 30, 2009
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Abstract
In an embodiment, a polycrystalline diamond compact (“PDC”) comprises a substrate and a pre-sintered polycrystalline diamond (“PCD”) table including a plurality of bonded diamond grains defining a plurality of interstitial regions, an upper surface, and a back surface that is bonded to the substrate. The pre-sintered PCD table includes a first thermally-stable region extending inwardly from the upper surface, and a second region located between the first thermally-stable region and the substrate. The second region exhibits a thermal stability that is less than that of the first thermally-stable region, and includes at least one interstitial constituent disposed interstitially between the bonded diamond grains thereof. The at least one interstitial constituent may include at least one silicon-containing phase.
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