Polycrystalline diamond, polycrystalline diamond compact,...

Details Polycrystalline diamond, polycrystalline diamond compact,... Polycrystalline diamond, polycrystalline diamond compact,...

C - Chemistry, Metallurgy

22

C

C22C 26/00 (2006.01)

Patent

CA 2739112

Embodiments of the invention relate to polycrystalline diamond ("PCD") exhibiting enhanced diamond-to-diamond bonding. In an embodiment, PCD includes a plurality of diamond grains defining a plurality of interstitial regions. A metal-solvent catalyst occupies at least a portion of the plurality of interstitial regions. The plurality of diamond grains and the metal-solvent catalyst collectively exhibit a coercivity of about 115 Oersteds ("Oe") or more and a specific magnetic saturation of about 15 Gauss cm3/grams ("G cm3/g") or less. Other embodiments are directed to polycrystalline diamond compacts ("PDCs") employing such PCD, methods of forming PCD and PDCs, and various applications for such PCD and PDCs in rotary drill bits, bearing apparatuses, and wire-drawing dies.

Des modes de réalisation de linvention concernent un diamant polycristallin (« PCD ») laissant apparaître une liaison améliorée entre diamants. Dans un mode de réalisation, le PCD comporte une pluralité de grains de diamant définissant une pluralité de zones interstitielles. Un catalyseur métal-solvant occupe au moins une partie de la pluralité de zones interstitielles. La pluralité de grains de diamant et le catalyseur métal-solvant laissent collectivement apparaître une coercivité denviron 115 Oersteds (« Oe ») ou plus et une saturation magnétique spécifique denviron 15 Gauss cm3/grammes (« G cm3/g ») ou moins. Dautres modes de réalisation concernent des comprimés de diamant polycristallin (« PCD ») employant ce PCD, des procédés de formation du PCD et de PCD, et diverses applications pour ces PCD et PCD dans des mèches rotatives, des appareils de support, et des filières de tréfilage.

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