Patents Assigned to ReedHyoalog (UK) Limited
  • Patent number: 6749033
    Abstract: 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.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: June 15, 2004
    Assignee: ReedHyoalog (UK) Limited
    Inventors: Nigel Dennis Griffin, Peter Raymond Hughes