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US 4,525,178 AGranted
Composite polycrystalline diamond
AssigneeMegadiamond Industries, Inc.
InventorDavid R. Hall
Life of this patent
Estimating the term…
Abstract
A composite material is described which includes a mixture of individual diamond crystals and pieces of precemented carbide. The mixture is heated and pressurized to create intercrystalline bonds between the diamond crystals and chemical bonds between the diamond crystals and the precemented carbide pieces. The resulting composite polycrystalline diamond body exhibits excellent wear characteristics and impact resistance.
Claims29
A composite material comprising:
- a mixture of diamond crystals and precemented carbide pieces formed under sufficient heat and pressure to create a composite polycrystalline body in which adjacent diamond crystals are bonded together and to the precemented carbide pieces, and in which the diamond crystals and the precemented carbide pieces are interspersed in one another, either the carbide pieces or diamond crystals providing a matrix for the composite material.
A composite material comprising:
- a polycrystalline diamond matrix formed of individual diamond crystals and having discrete pieces of precemented carbide intermixed with the individual diamond crystals and distributed throughout at least a portion of the polycrystalline diamond matrix, said individual diamond crystals bonded together and to the precemented carbide pieces under sufficient heat and pressure to form a dense, abrasion-resistant mass.
A composite material comprising:
- a precemented carbide matrix formed of individual pieces of precemented carbide and having individual diamond crystals bonded together to form polycrystalline diamond masses intermixed with the individual pieces of precemented carbide and distributed throughout at least a portion of the precemented carbide matrix, said precemented carbide pieces and individual diamond crystals bonded together under sufficient heat and pressure to form a dense, abrasion-resistant mass.
Dependencies are inferred from the claim text.