Polycrystalline diamond composite constructions comprising...

Details Polycrystalline diamond composite constructions comprising... Polycrystalline diamond composite constructions comprising...

2005-08-03

2008-12-09

Turner, Archene (Department: 1794)

Cutters, for shaping

Comprising tool of specific chemical composition

C428S212000, C428S336000, C428S408000, C428S469000

Reexamination Certificate

active

07462003

ABSTRACT:
PCD composite constructions comprise a diamond body bonded to a substrate. The diamond body comprises a thermally stable diamond bonded region that is made up of a single phase of diamond crystals bonded together. The diamond body includes a PCD region bonded to the thermally stable region and that comprises bonded together diamond crystals and interstitial regions interposed between the diamond crystals. The PCD composite is prepared by combining a first volume of PCD with a second volume of diamond crystal-containing material consisting essentially of a single phase of bonded together diamond crystals. A substrate is positioned adjacent to or joined to the first volume. The first and second volumes are subjected to high pressure/high temperature process conditions, during process the first and second volumes form a diamond bonded body that is attached to the substrate, and the second volume forms the thermally stable diamond bonded region.

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