Abstract:
To provide a hydrostatic pressure type high temperature and high-pressure treatment apparatus by a wet method and a dry method for efficiently mass-producing high-quality and large-sized synthetic diamond. In the treatment apparatus, a high-pressure cell prevented from the intrusion of a pressure medium into the inside is housed in a high-pressure container, and hydrostatic pressurization is performed by the liquid pressure medium. At least one pressurizing mechanism 10 for the pressure medium 6 is provided, and a pressure medium having a known compressibility and volume change rate is used. A heating mechanism for the pressure medium and a measuring means for the average temperature in the vertical direction are provided, the pressure medium is heated to a predetermined temperature to be thermally expanded, treatment is continued while maintaining the pressure even after the pressurizing mechanism is stopped, and two or more high-pressure cells 9 can be simultaneously subjected to high-temperature and high-pressure treatment at uniform pressure without directionality.
Abstract:
The present invention relates to new products and processes for making and using hop extract products comprising hop oils present in amounts between about 6 mL/100 g to about 40 mL/100 g, or more. The oil enriched hop extracts of the present invention also contain higher proportions of oil relative to other hop components typically found in hop extracts. Production of the oil enriched hop extracts may comprise a partial or a first extraction of hop materials. In one preferred embodiment, such extraction may occur under pressures of 1700 psi to about 3700 psi for less than three hours. The enriched oil extracts of the present invention can be used to produce beers having enhanced aroma and flavor profiles. The present invention also relates to products and processes for making and using second extractions of hop materials comprising alpha acids present in amounts of, for example, about 50% to about 70% (w/w).
Abstract:
A superabrasive compact and a method of making the superabrasive compact are disclosed. A superabrasive compact may comprise a superabrasive volume and a substrate. The substrate may be attached to the superabrasive volume via an interface. The superabrasive volume may be formed by a plurality of polycrystalline superabrasive particles. The superabrasive particles may have nano or sub-micron scale surface texture.
Abstract:
A press, an automated loading system for a press and related methods are provided including a loading system having a first assembly configured to carry a reaction cell to an anvil of a press base and a second assembly configured to assist in positioning and orientating the reaction cell on the anvil. In one embodiment, the first assembly may include a trolley displaceable along a guide member to carry the reaction cell to the anvil. The first and second assemblies may each include guide members that are displaceable relative to the anvil that are configured to position the reaction cell at a desired location and orientation on the anvil. In one embodiment, each of the guide members include arms that engage distinct sides of a cubic reaction cell. A clearing mechanism may also be incorporated to clear the surface of the anvil during operation of the system.
Abstract:
Cutting elements include a substrate, a thermally stable polycrystalline table comprising a superhard material secured to the substrate, and a layer of metal interposed between, and attaching the substrate and the thermally stable polycrystalline table. Methods of forming a cutting element include providing a thermally stable polycrystalline table in a mold, providing a layer of metal on the thermally stable polycrystalline table, distributing a mixture of particles comprising a plurality of hard particles and a plurality of particles comprising a matrix material on the layer of metal, and heating the mold while applying pressure to the mixture of particles to cause the mixture of particles to coalesce and form a substrate and at least partially melt the layer of metal to flow and wet the thermally stable polycrystalline table and the substrate to form an attachment therebetween.
Abstract:
In one embodiment of the present invention, an assembly for HPHT processing comprises a can with an opening. A powder mixture is disposed within the opening. A substrate is disposed within the opening adjacent the powder mixture. Paint is coated on a surface within the opening and opposite the powder mixture with respect to the substrate. A meltable sealant is disposed within the opening and opposite the substrate with respect to the surface and a cap is covering the opening.
Abstract:
A method for increasing the Seebeck coefficient of a semiconductor involves creating a reaction cell including a semiconductor in a pressure-transmitting medium, exposing the reaction cell to elevated pressure and elevated temperature for a time sufficient to increase the Seebeck coefficient of the semiconductor, and recovering the semiconductor with an increased Seebeck coefficient.
Abstract:
A miniature high pressure cell for sample characterization under pressure, comprising: a cell body defining a bore extending along an axis; first and second force transmitting elements mounted within said bore, said first and second force transmitting elements having respective first and second force transmitting faces which face towards each other in the axial direction; and a seal member positioned at least partially in said bore between said force transmitting elements, the seal member having walls defining a through-hole extending axially between respective sides and opening out towards respective force transmitting faces, said seal member and force transmitting elements being arranged such that, in use, the walls of said seal member defining said through-hole and portions of said force transmitting faces define the boundaries of a sealed sample volume in which a pressure transmitting medium and a sample to be characterized may be contained, wherein: at least one of said force transmitting elements is moveable so as to press said seal member between the faces; the miniature high pressure cell further comprising: a force locking apparatus for holding said force transmitting elements pressed against said seal member with a predetermined locking force, such that said sealed sample volume is held pressurized by said predetermined locking force; wherein said cell body includes a threaded portion and said force locking apparatus comprises at least one locking member with a threaded portion configured to cooperate with the threaded portion of said cell body, said threaded portions being coaxial with the axis of said bore and axially spaced from said seal member.
Abstract:
PCD materials comprise a diamond body having bonded diamond crystals and interstitial regions disposed among the crystals. The diamond body is formed from diamond grains and a catalyst material at high pressure/high temperature conditions. The diamond grains have an average particle size of about 0.03 mm or greater. At least a portion of the diamond body has a high diamond volume content of greater than about 93 percent by volume. The entire diamond body can comprise high volume content diamond or a region of the diamond body can comprise the high volume content diamond. The diamond body includes a working surface, a first region substantially free of the catalyst material, and a second region that includes the catalyst material. At least a portion of the first region extends from the working surface to depth of from about 0.01 to about 0.1 mm.
Abstract:
The present invention is directed to a method for changing the color of colored natural diamonds. The method includes placing a discolored natural diamond in a pressure-transmitting medium which is consolidated into a pill. Next, the pill is placed into a high pressure/high temperature (HP/HT) press at elevated pressure and elevated temperature for a time sufficient to improve the color of the diamond. The diamond may be exposed at elevated-pressure and elevated-temperature conditions within the graphite-stable region of the carbon-phase diagram—without significant graphitization of the diamond, or above the diamond-graphite equilibrium and within the diamond-stable region of the carbon-phase diagram. Finally, the diamond is recovered from said press. Colorless Type Ia and Type II diamonds may be made by this method.