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Polycrystalline diamond compact including pre-sintered polycrystalline diamond table having a thermally-stable region and applications therefor
Polycrystalline diamond compact including pre-sintered polycrystalline diamond table having a thermally-stable region and applications therefor
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机译:包括具有热稳定区域的预烧结多晶金刚石台的多晶金刚石压块及其应用
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摘要
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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