| 摘要 |
A method of forming a super hard PCD construction comprises forming an aggregated mass comprising a catalyst/solvent material for diamond, and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, forming a pre-sinter assembly comprising the aggregated mass and a plurality of diamond grains and treating the pre-sinter assembly at UHPT to form a PCD construction. Residual catalyst/solvent and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in non-carbide form at least partially fill a plurality of interstitial regions in the PCD. There is also disclosed a superhard PCD construction comprising a body of PCD material formed of a mass of diamond grains and a non-superhard phase at least partially filling a plurality of interstitial regions, wherein the non-superhard phase comprises one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in the non-carbide form. |
| 主权项 |
1. A method of forming a super hard polycrystalline diamond construction comprising:
forming an aggregated mass comprising a catalyst/solvent material for diamond, and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y; forming a pre-sinter assembly comprising the aggregated mass and a plurality of diamond grains; and treating the pre-sinter assembly in the presence of the catalyst/solvent material for the diamond grains at an super high pressure of around 5.5 GPa or greater and a temperature at which the diamond material is more thermodynamically stable than graphite to sinter together the diamond grains to form a polycrystalline diamond construction, the diamond grains exhibiting inter-granular bonding and defining a plurality of interstitial regions therebetween, residual catalyst/solvent and one or more of W, Mo, Cr, V, Ti, Zr, Nb, Hf, Ta, Sc, and/or Y, in non-carbide form at least partially filling a plurality of the interstitial regions. |
