INFLUENCE OF VOLUMETRIC AND SURFACE DEFECTS OF THE INITIAL GRINDING POWDERS OF DIAMOND GRADE AC6 ON THE CHANGE IN THEIR PHYSICAL AND MECHANICAL PROPERTIES

Abstract

The results of the investigation of the power of grinding powders diamond of brand DS with a grain size of 200/160-80/63, synthesized in Ni–Mn–C systems, presented in this article. It is shown that initial grinding diamonds distinguish between themselves for a different amount of volume and surface defects, which lead to a change in magnetic and mechanical properties. The increase in the compound of volume defects in the grinding powder of diamond with a grain size of 200/160 is twice as large in the diamonds with the inclusion of that house in the diamonds with a grain size of 80/63, which contributes to an increase in their magnetic properties by about 4 times and leads to decrease in their heat resistance by 1.5 times. The change in surface defects determined in the form of the coefficient of surface activity of diamond grinding powders of grain sizes from 200/160 to 80/63 indicates a decrease in the coefficient of surface activity of diamond grinding powders to a lesser extent for diamonds of larger sizes.