Polycrystalline diamond compacts, methods of making same, and applications therefor
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United States of America Patent
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Jul 10, 2012
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N/A
app pub date -
Dec 30, 2009
filing date -
Mar 30, 2009
priority date (Note) -
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Abstract
In an embodiment, a polycrystalline diamond compact (“PDC”) comprises a cemented carbide substrate including a first cemented carbide portion exhibiting a first concentration of chromium carbide and a second cemented carbide portion bonded to the first cemented carbide portion and exhibiting a second concentration of chromium carbide that is greater than the first concentration. The PDC further comprises a polycrystalline diamond (“PCD”) table bonded to the first cemented carbide portion. The PCD table includes a plurality of bonded diamond grains exhibiting diamond-to-diamond bonding therebetween, with the plurality of bonded diamond grains defining a plurality of interstitial regions. The PCD table includes chromium present in a concentration less than about 0.25 weight %.
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