Polycrystalline diamond
AssigneeElement Six Limited
InventorsGustav Johnny Israelsson, Karolina Elisabet Hannersjö, Pär Erik Håkan Schelin
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Abstract
A PCD composite compact comprising a PCD structure bonded at an interface to a substrate comprising cemented carbide material; the PCD structure comprising a mass of directly inter-bonded diamond grains having a mean size of at most about 4 microns, and the PCD structure comprising at least about 0.05 weight percent refractory metal or carbide of a refractory metal selected from the group comprising W, Ti, V, Cr, Zr, Nb, Mo, Hf and Ta; and at least the cemented carbide material proximate the interface having a content of metallic binder material of at most about 6 weight percent.
Claims22
A PCD composite compact comprising a PCD structure bonded at an interface to a substrate comprising cemented carbide material;
- the PCD structure comprising a mass of directly inter-bonded diamond grains having a mean size of at most about 4, microns, and the PCD structure comprising at least about 0.05, weight percent refractory metal or carbide of a refractory metal selected from the group comprising Ti, V, Cr, Zr, Nb, Mo, Hf and Ta;
- and at least the cemented carbide material proximate the interface having a content of metallic binder material of at most about 6, weight percent of the cemented carbide material;
- wherein the PCD structure contains sufficiently few large diamond grains having a dimension of at least double the D(99.99) value of the size distribution of the mass of grains, sufficiently sparsely dispersed therein, such that when a cross-section through the PCD structure, the substrate, and the interface is viewed, at most about 7, large diamond grains are evident at the cross-section along a length of at least about 10, mm of the interface.
A PCD composite compact comprising a PCD structure bonded at an interface to a substrate comprising cemented carbide material;
- the PCD structure comprising a mass of directly inter-bonded diamond grains having a mean size of at most about 4 microns, and the PCD structure comprising at least about 0.05 weight percent refractory metal or carbide of a refractory metal selected from the group consisting of W, Ti, V, Cr, Zr, Nb, Mo, Hf and Ta, and more than 15 weight percent catalyst material for diamond;
- and at least the cemented carbide material proximate the interface having a content of metallic binder material of at most about 6 weight percent of the cemented carbide material.
A PCD composite compact comprising a PCD structure bonded at an interface to a substrate comprising cemented carbide material;
- the PCD structure comprising a mass of directly inter-bonded diamond grains having a mean size of at most about 4, microns;
- and at least the cemented carbide material proximate the interface having a content of metallic binder material of at most about 6, weight percent of the cemented carbide material;
- wherein the PCD structure contains sufficiently few large diamond grains having a dimension of at least double the D(99.99) value of the size distribution of the mass of grains, sufficiently sparsely dispersed therein, such that when a cross-section through the PCD structure, the substrate, and the interface is viewed, at most about 7, large diamond grains are evident at the cross-section along a length of at least about 10, mm of the interface.
Dependencies are inferred from the claim text.