Abstract: A synthetic diamond body and method of making the synthetic diamond body are provided. The synthetic diamond body having a low stress and free of cracks may comprise a first single crystal partial volume having the first crystallographic orientation and a one or more of other single crystal partial volumes, wherein the first partial volume occupies less than about 100% of the total volume of synthetic diamond wafer, and each other single crystal partial volume has its own crystallographic orientation; and each other single crystal partial volume comprises a plurality of single crystal volumes all having about the same crystallographic orientation, wherein the crystallographic orientation of each partial volume is fixed against the first crystallographic orientation by a geometrical operation.

Abstract: A method for producing process equipment having a wear surface having extended resistance to one or more of abrasion, erosion, or corrosion, associated with materials processed by said process equipment includes applying to said process. equipment wear surface a metal matrix coating filled with superabrasive particles. Diamond and cubic boron nitride superabrasive particles can fill the metal matrix, which can be a nickel coating.

Abstract: A method for producing process equipment having a wear surface having extended resistance to one or more of abrasion, erosion, or corrosion, associated with fillers or solids processed by said process equipment includes applying to said process equipment wear surface a metal matrix coating filled with superabrasive particles. Diamond and cubic boron nitride superabrasive particles can fill the metal matrix, which can be a nickel coating.

Abstract: A method for removing defects at high pressure and high temperature (HP/HT) or for relieving strain in a non-diamond crystal commences by providing a crystal, which contains defects, and a pressure medium. The crystal and the pressure medium are disposed in a high pressure cell and placed in a high pressure apparatus, for processing under reaction conditions of sufficiently high pressure and high temperature for a time adequate for one or more of removing defects or relieving strain in the single crystal.

Abstract: Product forming molds have surfaces conformally coated with a coating composite comprising superabrasive particles. In one embodiment, the mold surface is plated (electrolessly or electrolytically) or coated with a metal having superabrasive particles dispersed therein. In another embodiment, the composite is a SiC composite having superabrasive particles dispersed therein.

Abstract: A capsule for containing at least one reactant and a supercritical fluid in a substantially air-free environment under high pressure, high temperature processing conditions. The capsule includes a closed end, at least one wall adjoining the closed end and extending from the closed end; and a sealed end adjoining the at least one wall opposite the closed end. The at least one wall, closed end, and sealed end define a chamber therein for containing the reactant and a solvent that becomes a supercritical fluid at high temperatures and high pressures. The capsule is formed from a deformable material and is fluid impermeable and chemically inert with respect to the reactant and the supercritical fluid under processing conditions, which are generally above 5 kbar and 550° C. and, preferably, at pressures between 5 kbar and 80 kbar and temperatures between 550° C. and about 1500° C.