Thick pointed superhard material

  • US 8,028,774 B2
  • Filed: 11/25/2009
  • Issued: 10/04/2011
  • Est. Priority Date: 10/26/2006
  • Status: Active Grant
First Claim
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1. A high impact resistant tool, comprising:

  • a sintered polycrystalline diamond material bonded to a cemented metal carbide substrate at a non-planar interface, said polycrystalline diamond material including;

    a concentration from about 1 percent to about 5 percent of binding agents by weight;

    an apex having a central axis, said central axis passing through said cemented metal carbide substrate, said apex having radius of curvature measured in a vertical orientation from said central axis, said radius of curvature being from about 0.050 to about 0.125 inches; and

    a thickness from said apex to said non-planar interface from about 0.100 to about 0.500 inches.

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