Physical-mechanical properties of nanocrystalline materials based on ultrafine-dispersed diamonds

Abstract

The physical-mechanical properties of polycrystals produced on the basis of ultrafine-dispersed diamonds (UDDs) at high static pressures with the use of thermal treatment in vacuum are investigated. The properties of the polycrystals are shown to depend on the sintering conditions and sintering technique, as well as on the modification of the starting powders. With the addition of metals (Co, Ti) to UDD powders, the mechanical strength of compacts increases, their structure improves, and their parameters can be optimized at lower thermobaric treatment temperatures. By studying the products of thermal treatment of UDDs in vacuum, it is established that the compacts and individual particles that form during thermal treatment differ significantly in microhardness.