Abstract:
The invention relates to a method for debindering and/or purifying granules or material suitable for use in High Pressure High Temperatures diamond or cubic boron nitride synthesis, the method comprising the steps of passing the granules or material through a zone having controlled atmosphere and temperature in a continuous manner, the zone having a maximum temperature within the zone of greater than approximately 600°C, wherein the time spent by each granule within the zone is less than 30 minutes.
Abstract:
A high temperature/high pressure (HP/HT) apparatus for converting feedstock housed in a capsule into product crystals, comprising at least two electrical heating paths for independent control of both the mean temperature in the reaction cell and the temperature gradient across the reaction cell.
Abstract:
An assembly for High Pressure High Temperature (HPHT) synthesis of a superhard material. The assembly comprises a container comprising a first metal. A closure also comprising the first metal is sealed to the container using a sealant material. The sealant material comprises a second metal, the seal comprising a composition of the first and second metals formable below the melting point of the second metal. The container contains superhard material.
Abstract:
Assemblies as disclosed herein for making superhard products by HPHT process comprise a first can portion for accommodating a mixture of materials therein and a second can mated with the first can portion. A leak-tight seal is provided between the first can portion and second can portion in a manner that accommodates the manufacture of relatively longer superhard products without having to change other elements or members used for HPHT processing to thereby provide improved manufacturing flexibility and cost efficiency.
Abstract:
The present invention relates to the material science and the field of synthetic diamonds and diamond-like materials and methods and devices for production thereof. The object of the invention is to increase the yield of the HPHT-(High-Pressure High- Temperature) -Technology for production of synthetic diamonds and diamond-like materials as well as to achieve the continuous production of large amounts or quantities of synthetic diamonds with perfect or high quality. The object of the invention will be reached by methods and devices according to the present invention, wherein the method comprises the following steps: cultivation or collection of biomass, preparing and chemical modification of biomass preferably by (adding or enriching with) salt or salts containing at least one catalyst, incineration of biomass to ash, adding to ash modifiers including salt or salts containing at least one catalyst, HPHT-treatment of the resulting carbon-containing matrix and the isolation of the products after the HPHT- treatment. The device according to the present invention carries out the steps of the method according to the present invention.
Abstract:
A polycrystalline diamond (PCD) compact and method for making the compact are provided. The method includes bringing a first PCD wafer and a second PCD wafer together at an interface in the presence of a bonding agent to form an unbonded assembly and bonding the wafers together at the interface at a pressure and temperature at which diamond is thermodynamically stable. The first PCD wafer is more thermally stable than the second PCD wafer.
Abstract:
The invention relates to a method for debindering and/or purifying granules or material suitable for use in High Pressure High Temperatures diamond or cubic boron nitride synthesis, the method comprising the steps of passing the granules or material through a zone having controlled atmosphere and temperature in a continuous manner, the zone having a maximum temperature within the zone of greater than approximately 600°C, wherein the time spent by each granule within the zone is less than 30 minutes.
Abstract:
La presente invención consiste en conseguir con la cápsula que se presenta un gradiente vertical favorable para el crecimiento de diamantes, prevaleciendo sobre cualquier gradiente radial por medio de discos calefactores en los extremos de la zona de calefacción, lo cual implica un gran control sobre las condiciones de crecimiento. Más concretamente, sobre la velocidad de crecimiento, posibilita, a su vez, un mejor control de la calidad en grandes cristales. Otra novedad importante es emplear una fuente de carbono con un diseño especial formado por huecos cilíndricos y cónicos (grafito, carbono amorfo, diamante u otro) con un metal disolvente con un número de gases que se introducen en la cápsula. Asimismo se utiliza un captador de nitrógeno para evitar la formación de nitruros, carburos, óxidos, que son perjudiciales para el crecimiento que como novedad importante se coloca fuera de la zona de reacción.
Abstract:
A high temperature/high pressure (HP/HT) apparatus for converting feedstock housed in a capsule into product crystals, comprising at least two electrical heating paths for independent control of both the mean temperature in the reaction cell and the temperature gradient across the reaction cell.