Loading patent…
OwnerJames Wilbert Campbell, Moosa Mahomed Adia +5inventors
InventorsJames Wilbert Campbell, Moosa Mahomed Adia, Geoffrey John Davies, Raymond Albert Chapman, Klaus Tank, Aulette Stewart, Lesley Kay Hedges
Estimating the term…
A method of making a bonded, coherent material comprising a mass of diamond crystals in a matrix, which optionally contains another phase. The method includes the steps of providing a source of diamond crystals, providing a plurality of diamond centers defined by diamond crystals, producing a reaction mass by bringing the source and growth centers into contact with a solvent/catalyst, subjecting the reaction mass to conditions of elevated temperature and pressure suitable for crystal growth in the reaction zone of a high temperature/high pressure apparatus to produce the material, and removing the material from the reaction zone. The method is characterized by providing the necessary supersaturation of carbon in the solvent/catalyst, at least in part and preferably predominantly, by a selection of particle size difference between the source crystal and the growth centers. The mass of diamond crystals in the matrix of the bonded, coherent material of the invention has a high concentration of twinned diamonds.
A method of making a bonded coherent material comprising a mass of diamond crystals in a matrix, comprising providing a source of diamond crystals, providing a plurality of growth centers defined by diamond crystals, producing a reaction mass by bringing the source and growth centers into contact with a solvent/catalyst, subjecting the reaction mass to conditions of elevated temperature and pressure suitable for crystal growth in a reaction zone of a high temperature/high pressure apparatus to produce the material and removing the material from the reaction zone, wherein supersaturation of carbon in the solvent/catalyst is achieved, and is achieved predominantly by a selection of particle size difference between the source crystal and the growth centers,
A bonded, coherent material comprising a mass of diamond crystals in a matrix containing a solvent/catalyst characterised in that the diamond mass contains at least 40 percent synthetic twinned diamonds.
Dependencies are inferred from the claim text.