Layered polycrystalline diamond
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United States of America Patent
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Jan 13, 2015
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N/A
app pub date -
Sep 6, 2013
filing date -
Apr 30, 2008
priority date (Note) -
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Abstract
In one aspect of the present invention, a high impact wear resistant tool has a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a thickness of at least 0.100 inch and forms an included angle of 35 to 55 degrees. The superhard material has a plurality of substantially distinct diamond layers. Each layer of the plurality of layers has a different catalyzing material concentration. A diamond layer adjacent the substrate of the superhard material has a higher catalyzing material concentration than a diamond layer at a distal end of the superhard material.
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