Thermally stable diamond polycrystalline diamond constructions
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United States of America Patent
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Jul 13, 2010
Grant Date -
Mar 23, 2006
app pub date -
Sep 21, 2004
filing date -
Sep 21, 2004
priority date (Note) -
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Abstract
Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals and a plurality of interstitial regions disposed among the crystals. A metallic substrate is attached to the diamond body. A working surface is positioned along an outside portion of the diamond body, and the diamond body comprises a first region that is substantially free of a catalyst material, and a second region that includes the catalyst material. The diamond body first region extends from the working surface to depth of at least about 0.02 mm to a depth of less than about 0.09 mm. The diamond body includes diamond crystals having an average diamond grain size of greater than about 0.02 mm, and comprises at least 85 percent by volume diamond based on the total volume of the diamond body.
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