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    • 8. 发明授权
    • Polycrystalline diamond partially depleted of catalyzing material
    • 多晶金刚石部分耗尽催化材料
    • US06749033B2
    • 2004-06-15
    • US10065600
    • 2002-11-01
    • Nigel Dennis GriffinPeter Raymond Hughes
    • Nigel Dennis GriffinPeter Raymond Hughes
    • E21B1046
    • E21B10/567C04B37/021Y10T407/27Y10T428/12493Y10T428/12625Y10T428/24942Y10T428/26Y10T428/265Y10T428/30
    • 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.
    • 本发明提供了超硬多晶金刚石或类金刚石元件,其具有大大提高的抗热降解性,而不损失冲击强度。 统称为PCD元件,这些元件在高温高压工艺中由粘合剂催化材料形成。 PCD元件具有形成至少一个连续金刚石基体的多个部分结合的金刚石或类金刚石晶体,并且金刚石晶体之间的间隙形成至少一个含有催化材料的连续间隙基质。 元件具有工作表面和主体,其中与工作表面相邻的主体中的间隙基质的一部分基本上不含催化材料,而剩余的间隙基质含有催化材料。 这意味着切割应用中的耐磨性更高,散热片应用中的传热能力更强,并且在许多其他应用中具有优点,包括中空模具,压头,工具心轴和磨损元件。