A method is devised for producing diamond polycrystals (compacts) from variously dispersed synthetic and natural diamond powders. The method is based on sintering the powders under high pressures and high temperatures.

The compacts are produced in the shape of cylinders. Presently, a technology is devised for producing compacts of sizes (diameter/ height) 4/3, 6/4, 7/5, 10/8, 15/10 and of mass from 0.5 to 35 carats.

The compacts feature high strength and abrasive resistance, and by these characteristics they are highly competitive with natural monocrystals.

The compacts can be sintered with measured amounts of additives, decreasing thermal strength of the material but increasing its abrasive and impact resistance.

The compacts are supplied as non-machined workpieces or articles of a predetermined shape (cubes, triangles, prisms, needles, etc.) obtained by laser cutting of the workpieces.

The compacts (workpieces or articles) are used in drilling and dressing tools; another application is to make drawing dies, substrates for electronic devices, heat sinks, etc.

 Contact person: Dr. Valentin Ryzhov. E-mail: ryzhov@hppi.troitsk.ru