DEREVIANKO O. Features of alloying during the consolidation of powder materials based on abrasive-metal systems under electric current action.

The work is devoted to solving a scientific and technical problem on the development and research, which is very relevant today, the conditions for obtaining and achieving the properties of powder composite materials based on the diamond-metal binder based on Cu-Sn-Co-Cr for instrumental purposes, obtained by passing a rectified direct current. The analysis of the processes occurring in the unit cell is carried out. Mathematical models have been developed that explain the interaction processes along the transition boundary between the surface of a solid body and a layer of a liquid phase that surrounds it in a dispersed body under the condition of direct passage of a direct electric current. Scientific and practical approaches to sintering of powder high-wearresistant materials based on diamond-metal components are formulated. A technological scheme for the manufacture of composite materials based on the system diamond - metal binder based on Cu-Sn-Co-Cr for instrumental purposes, obtained by passing a rectified direct current, has been developed. The processes of their structure formation, physical and mechanical properties have been investigated, and the working capacity of the processing bodies (granite, marble) has been determined. Key words: Sintering, direct current, diamond-containing tool, Sherwood criterion, abrasive ability, powder high-wear materials.