Thermally-stable polycrystalline diamond materials and compacts
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United States of America Patent
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Jan 6, 2009
Grant Date -
Oct 20, 2005
app pub date -
Dec 6, 2004
filing date -
Dec 5, 2003
priority date (Note) -
Expired
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Abstract
Thermally-stable polycrystalline diamond materials of this invention comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/catalyst material. The reaction product is disposed within interstitial regions of the polycrystalline diamond material that exists between the bonded diamond crystals. The first and second phases are formed during a single high pressure/high temperature process condition. The reaction product has a coefficient of thermal expansion that is relatively closer to that of the bonded together diamond crystals than that of the binder/catalyst material, thereby providing an improved degree of thermal stability to the polycrystalline diamond material.
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