06878447 is referenced by 145 patents and cites 101 patents.

The present invention provides a superhard polycrystalline diamond or diamond-like element with greatly improved resistance to thermal degradation without loss of impact strength. Collectively called PCD elements, these elements are formed with a binder-catalyzing material in a high-temperature, high-pressure process. The PCD element has a plurality of partially bonded diamond or diamond-like crystals forming at least one continuous diamond matrix, and the interstices among the diamond crystals forming at least one continuous interstitial matrix containing a catalyzing material. The element has a working surface and a body, where a portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and the remaining interstitial matrix contains the catalyzing material. This translates to higher wear resistance in cutting applications, higher heat transfer capacity in heat sink applications, and has advantages in numerous other applications including hollow dies, indentors, tool mandrels, and wear elements.

Title
Polycrystalline diamond partially depleted of catalyzing material
Application Number
10/604007
Publication Number
6878447 (B2)
Application Date
June 20, 2003
Publication Date
April 12, 2005
Inventor
Peter Raymond Hughes
Stroud
GB
Nigel Dennis Griffin
Nympsfield
GB
Agent
Jeffery E Daly
Assignee
ReedHycalog
GB
IPC
C23C 016/04
F16C 033/04
B32B 009/00
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